<?xml version="1.0" encoding="utf-8"?>
<!--Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 14-February-2024 [05:16:33] {AM}-->
<schema targetNamespace="http://www.aw.com/20230930" elementFormDefault="qualified" xmlns:avro="http://www.aw.com/20230930" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:country="http://xbrl.sec.gov/country/2023" xmlns:currency="http://xbrl.sec.gov/currency/2023" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:exch="http://xbrl.sec.gov/exch/2023" xmlns:naics="http://xbrl.sec.gov/naics/2023" xmlns:sic="http://xbrl.sec.gov/sic/2023" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:stpr="http://xbrl.sec.gov/stpr/2023" xmlns:deprecated="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" xmlns:srt="http://fasb.org/srt/2023" xmlns:srt-types="http://fasb.org/srt-types/2023" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21">
<annotation>
<appinfo>
<link:roleType roleURI="http://www.aw.com/role/Cover" id="Cover">
<link:definition>1001 - Document - Cover</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CondensedConsolidatedBalanceSheets" id="CondensedConsolidatedBalanceSheets">
<link:definition>1002 - Statement - Condensed Consolidated Balance Sheets</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CondensedConsolidatedBalanceSheetsParenthetical" id="CondensedConsolidatedBalanceSheetsParenthetical">
<link:definition>1003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss" id="CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss">
<link:definition>1004 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CondensedConsolidatedStatementsOfStockholdersEquity" id="CondensedConsolidatedStatementsOfStockholdersEquity">
<link:definition>1005 - Statement - Condensed Consolidated Statements of Stockholders' Equity</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CondensedConsolidatedStatementsOfStockholdersEquityParenthetical" id="CondensedConsolidatedStatementsOfStockholdersEquityParenthetical">
<link:definition>1006 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Parenthetical)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CondensedConsolidatedStatementsOfCashFlows" id="CondensedConsolidatedStatementsOfCashFlows">
<link:definition>1007 - Statement - Condensed Consolidated Statements of Cash Flows</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NatureOfTheBusiness" id="NatureOfTheBusiness">
<link:definition>1008 - Disclosure - Nature of the Business</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SummaryOfSignificantAccountingPolicies" id="SummaryOfSignificantAccountingPolicies">
<link:definition>1009 - Disclosure - Summary of Significant Accounting Policies</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LicenseAgreements" id="LicenseAgreements">
<link:definition>1010 - Disclosure - License Agreements</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/FairValueMeasurement" id="FairValueMeasurement">
<link:definition>1011 - Disclosure - Fair Value Measurement</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformation" id="SupplementalBalanceSheetInformation">
<link:definition>1012 - Disclosure - Supplemental Balance Sheet Information</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/Leases" id="Leases">
<link:definition>1013 - Disclosure - Leases</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/CommitmentsAndContingencies" id="CommitmentsAndContingencies">
<link:definition>1014 - Disclosure - Commitments and Contingencies</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/KSavingsPlan" id="KSavingsPlan">
<link:definition>1015 - Disclosure - 401(k) Savings Plan</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NotePayable" id="NotePayable">
<link:definition>1016 - Disclosure - Note Payable</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockholdersEquity" id="StockholdersEquity">
<link:definition>1017 - Disclosure - Stockholders' Equity</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensation" id="StockBasedCompensation">
<link:definition>1018 - Disclosure - Stock-Based Compensation</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/IncomeTaxes" id="IncomeTaxes">
<link:definition>1019 - Disclosure - Income Taxes</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NetIncomeLossPerShare" id="NetIncomeLossPerShare">
<link:definition>1020 - Disclosure - Net Income (Loss) Per Share</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/RelatedPartyTransactions" id="RelatedPartyTransactions">
<link:definition>1021 - Disclosure - Related Party Transactions</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/RestructuringActivities" id="RestructuringActivities">
<link:definition>1022 - Disclosure - Restructuring Activities</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SubsequentEvents" id="SubsequentEvents">
<link:definition>1023 - Disclosure - Subsequent Events</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SummaryOfSignificantAccountingPoliciesPolicies" id="SummaryOfSignificantAccountingPoliciesPolicies">
<link:definition>1024 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SummaryOfSignificantAccountingPoliciesTables" id="SummaryOfSignificantAccountingPoliciesTables">
<link:definition>1025 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/FairValueMeasurementTables" id="FairValueMeasurementTables">
<link:definition>1026 - Disclosure - Fair Value Measurement (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformationTables" id="SupplementalBalanceSheetInformationTables">
<link:definition>1027 - Disclosure - Supplemental Balance Sheet Information (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LeasesTables" id="LeasesTables">
<link:definition>1028 - Disclosure - Leases (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NotePayableTables" id="NotePayableTables">
<link:definition>1029 - Disclosure - Note Payable (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockholdersEquityTables" id="StockholdersEquityTables">
<link:definition>1030 - Disclosure - Stockholders' Equity (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensationTables" id="StockBasedCompensationTables">
<link:definition>1031 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/IncomeTaxesTables" id="IncomeTaxesTables">
<link:definition>1032 - Disclosure - Income Taxes (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NetIncomeLossPerShareTables" id="NetIncomeLossPerShareTables">
<link:definition>1033 - Disclosure - Net Income (Loss) Per Share (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/RestructuringActivitiesTables" id="RestructuringActivitiesTables">
<link:definition>1034 - Disclosure - Restructuring Activities (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NatureOfTheBusinessAdditionalInformationDetail" id="NatureOfTheBusinessAdditionalInformationDetail">
<link:definition>1035 - Disclosure - Nature of the Business - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" id="SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail">
<link:definition>1036 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfPropertyAndEquipmentEstimatedUsefulLifeDetail" id="SummaryOfSignificantAccountingPoliciesScheduleOfPropertyAndEquipmentEstimatedUsefulLifeDetail">
<link:definition>1037 - Disclosure - Summary of Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Life (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LicenseAgreementsAdditionalInformationDetail" id="LicenseAgreementsAdditionalInformationDetail">
<link:definition>1038 - Disclosure - License Agreements - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/FairValueMeasurementSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" id="FairValueMeasurementSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail">
<link:definition>1039 - Disclosure - Fair Value Measurement - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformationSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetail" id="SupplementalBalanceSheetInformationSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetail">
<link:definition>1040 - Disclosure - Supplemental Balance Sheet Information - Summary of Prepaid Expenses and Other Current Assets (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformationSummaryOfPropertyAndEquipmentNetDetail" id="SupplementalBalanceSheetInformationSummaryOfPropertyAndEquipmentNetDetail">
<link:definition>1041 - Disclosure - Supplemental Balance Sheet Information - Summary of Property and Equipment, Net (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformationAdditionalInformationDetail" id="SupplementalBalanceSheetInformationAdditionalInformationDetail">
<link:definition>1042 - Disclosure - Supplemental Balance Sheet Information - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformationSummaryOfRestrictedCashDetail" id="SupplementalBalanceSheetInformationSummaryOfRestrictedCashDetail">
<link:definition>1043 - Disclosure - Supplemental Balance Sheet Information - Summary of Restricted Cash (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SupplementalBalanceSheetInformationSummaryOfAccruedExpensesDetail" id="SupplementalBalanceSheetInformationSummaryOfAccruedExpensesDetail">
<link:definition>1044 - Disclosure - Supplemental Balance Sheet Information - Summary of Accrued Expenses (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LeasesAdditionalInformationDetail" id="LeasesAdditionalInformationDetail">
<link:definition>1045 - Disclosure - Leases - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LeasesSummaryOfEffectiveLeaseCostComprehensiveIncomeLossDetail" id="LeasesSummaryOfEffectiveLeaseCostComprehensiveIncomeLossDetail">
<link:definition>1046 - Disclosure - Leases - Summary of effective lease cost comprehensive income loss (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LeasesSummaryOfFutureMinimumPaymentsOfOperatingLeaseLiabilitiesDetail" id="LeasesSummaryOfFutureMinimumPaymentsOfOperatingLeaseLiabilitiesDetail">
<link:definition>1047 - Disclosure - Leases - Summary of Future Minimum Payments of Operating Lease Liabilities (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/LeaseScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesRelevantAccountingStandardDetail" id="LeaseScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesRelevantAccountingStandardDetail">
<link:definition>1048 - Disclosure - Lease - Schedule of Future Minimum Lease Payments for Capital Leases Relevant Accounting Standard (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NotePayableAdditionalInformationDetail" id="NotePayableAdditionalInformationDetail">
<link:definition>1049 - Disclosure - Note Payable - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NotePayableCarryingValueOfNotePayableDetail" id="NotePayableCarryingValueOfNotePayableDetail">
<link:definition>1050 - Disclosure - Note Payable - Carrying Value of Note Payable (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NotePayableFuturePrincipalPaymentsDetail" id="NotePayableFuturePrincipalPaymentsDetail">
<link:definition>1051 - Disclosure - Note Payable - Future Principal Payments (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockholdersEquityAdditionalInformationDetail" id="StockholdersEquityAdditionalInformationDetail">
<link:definition>1052 - Disclosure - Stockholders' Equity - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockholdersEquitySummaryOfCommonStockReservedForFutureIssuanceDetail" id="StockholdersEquitySummaryOfCommonStockReservedForFutureIssuanceDetail">
<link:definition>1053 - Disclosure - Stockholders' Equity - Summary of Common Stock Reserved for Future Issuance (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensationSummaryOfAssumptionsThatUsedToDetermineGrantDateFairValueOfStockOptionsGrantedToEmployeesAndMembersOfBoardOfDirectorsDetail" id="StockBasedCompensationSummaryOfAssumptionsThatUsedToDetermineGrantDateFairValueOfStockOptionsGrantedToEmployeesAndMembersOfBoardOfDirectorsDetail">
<link:definition>1054 - Disclosure - Stock-Based Compensation - Summary of Assumptions that Used to Determine Grant-Date Fair Value of Stock Options Granted to Employees and Members of Board of Directors (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensationSummaryOfStockOptionActivityDetail" id="StockBasedCompensationSummaryOfStockOptionActivityDetail">
<link:definition>1055 - Disclosure - Stock-Based Compensation - Summary of Stock Option Activity (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensationAdditionalInformationDetail" id="StockBasedCompensationAdditionalInformationDetail">
<link:definition>1056 - Disclosure - Stock-Based Compensation - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensationSummaryOfRestrictedCommonStockUnitsDetail" id="StockBasedCompensationSummaryOfRestrictedCommonStockUnitsDetail">
<link:definition>1057 - Disclosure - Stock-Based Compensation - Summary of Restricted Common Stock Units (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/StockBasedCompensationScheduleOfStockBasedCompensationExpenseDetail" id="StockBasedCompensationScheduleOfStockBasedCompensationExpenseDetail">
<link:definition>1058 - Disclosure - Stock-Based Compensation - Schedule of Stock-based Compensation Expense (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/KSavingsPlanAdditionalInformationDetail" id="KSavingsPlanAdditionalInformationDetail">
<link:definition>1059 - Disclosure - 401(k) Savings Plan - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/IncomeTaxesAdditionalInformationDetail" id="IncomeTaxesAdditionalInformationDetail">
<link:definition>1060 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/IncomeTaxesScheduleOfReconciliationOfIncomeTaxExpenseBenefitDetail" id="IncomeTaxesScheduleOfReconciliationOfIncomeTaxExpenseBenefitDetail">
<link:definition>1061 - Disclosure - Income Taxes - Schedule of Reconciliation of Income Tax Expense (Benefit) (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetail" id="IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetail">
<link:definition>1062 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NetIncomeLossPerShareComponentsOfBasicAndDilutedEarningsPerShareDetail" id="NetIncomeLossPerShareComponentsOfBasicAndDilutedEarningsPerShareDetail">
<link:definition>1063 - Disclosure - Net Income (Loss) Per Share - Components of Basic and Diluted Earnings Per Share (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/NetIncomeLossPerShareScheduleOfDilutiveCommonStockEquivalentsExcludedFromComputationOfDilutedNetLossPerShareDetail" id="NetIncomeLossPerShareScheduleOfDilutiveCommonStockEquivalentsExcludedFromComputationOfDilutedNetLossPerShareDetail">
<link:definition>1064 - Disclosure - Net Income (Loss) Per Share - Schedule of Dilutive Common Stock Equivalents Excluded from Computation of Diluted Net Loss per Share (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/RelatedPartyTransactionsAdditionalInformationDetail" id="RelatedPartyTransactionsAdditionalInformationDetail">
<link:definition>1065 - Disclosure - Related Party Transactions - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/RestructuringActivitiesAdditionalInformationDetails" id="RestructuringActivitiesAdditionalInformationDetails">
<link:definition>1066 - Disclosure - Restructuring Activities (Additional Information) (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/RestructuringActivitiesSummaryOfRestructuringActivitiesDetail" id="RestructuringActivitiesSummaryOfRestructuringActivitiesDetail">
<link:definition>1067 - Disclosure - Restructuring Activities - Summary of Restructuring Activities (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://www.aw.com/role/SubsequentEventsAdditionalInformationDetails" id="SubsequentEventsAdditionalInformationDetails">
<link:definition>1068 - Disclosure - Subsequent Events (Additional Information) (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:linkbaseRef xlink:type="simple" xlink:href="avro-20230930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
<link:linkbaseRef xlink:type="simple" xlink:href="avro-20230930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
<link:linkbaseRef xlink:type="simple" xlink:href="avro-20230930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
<link:linkbaseRef xlink:type="simple" xlink:href="avro-20230930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
</appinfo>
</annotation>
<import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
<import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
<import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
<import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" />
<import namespace="http://xbrl.sec.gov/country/2023" schemaLocation="https://xbrl.sec.gov/country/2023/country-2023.xsd" />
<import namespace="http://xbrl.sec.gov/currency/2023" schemaLocation="https://xbrl.sec.gov/currency/2023/currency-2023.xsd" />
<import namespace="http://xbrl.sec.gov/exch/2023" schemaLocation="https://xbrl.sec.gov/exch/2023/exch-2023.xsd" />
<import namespace="http://xbrl.sec.gov/naics/2023" schemaLocation="https://xbrl.sec.gov/naics/2023/naics-2023.xsd" />
<import namespace="http://xbrl.sec.gov/sic/2023" schemaLocation="https://xbrl.sec.gov/sic/2023/sic-2023.xsd" />
<import namespace="http://xbrl.sec.gov/stpr/2023" schemaLocation="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd" />
<import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
<import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
<import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
<import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" />
<import namespace="http://fasb.org/us-types/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-types-2023.xsd" />
<import namespace="http://fasb.org/srt-types/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-types-2023.xsd" />
<import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd" />
<import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" />
<element name="GainLossOnImpairment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_GainLossOnImpairment" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="AtTheMarketFacilityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_AtTheMarketFacilityMember" substitutionGroup="xbrli:item" />
<element name="TwoThousandEighteenEmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TwoThousandEighteenEmployeeStockPurchasePlanMember" substitutionGroup="xbrli:item" />
<element name="ProceedsFromSaleOfPropertyPlantAndEquipments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ProceedsFromSaleOfPropertyPlantAndEquipments" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="CommonStockOfferingCostsIncurredButNotYetPaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_CommonStockOfferingCostsIncurredButNotYetPaid" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="OtherAdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_OtherAdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="NonCashLeaseExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_NonCashLeaseExpense" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="GainLossOnExtinguishmentOfOperatingLease" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_GainLossOnExtinguishmentOfOperatingLease" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="GainLossOnImpairmentOfLeaseholdImprovements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_GainLossOnImpairmentOfLeaseholdImprovements" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="DeferredRentExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_DeferredRentExpense" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="NonCashInterestExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_NonCashInterestExpense" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="CurrentAndNonCurrentOperatingLeaseLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_CurrentAndNonCurrentOperatingLeaseLiabilities" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="RepaymentOfNotePayableIncludingEndOfTermCharge" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_RepaymentOfNotePayableIncludingEndOfTermCharge" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="LicenseAgreementsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LicenseAgreementsAbstract" substitutionGroup="xbrli:item" />
<element name="LicenseAgreementDisclosureTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_LicenseAgreementDisclosureTextBlock" substitutionGroup="xbrli:item" />
<element name="EmergingGrowthCompanyStatusPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_EmergingGrowthCompanyStatusPolicyTextBlock" substitutionGroup="xbrli:item" />
<element name="RecentlyAdoptedAccountingPronouncementsPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_RecentlyAdoptedAccountingPronouncementsPolicyTextBlock" substitutionGroup="xbrli:item" />
<element name="ScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLifeTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLifeTableTextBlock" substitutionGroup="xbrli:item" />
<element name="ScheduleOfEffectiveLeaseCostComprehensiveIncomeLossTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ScheduleOfEffectiveLeaseCostComprehensiveIncomeLossTableTextBlock" substitutionGroup="xbrli:item" />
<element name="CashPaymentOfClosingTheTransaction" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_CashPaymentOfClosingTheTransaction" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="CompanyWorkforceReductionNumberOfEmployees" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_CompanyWorkforceReductionNumberOfEmployees" substitutionGroup="xbrli:item" />
<element name="ReductionInWorkforcePercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_ReductionInWorkforcePercentage" substitutionGroup="xbrli:item" />
<element name="SignificantAccountingPoliciesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_SignificantAccountingPoliciesAbstract" substitutionGroup="xbrli:item" />
<element name="ForeignExchangeLoss" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ForeignExchangeLoss" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="PropertyPlantAndEquipmentUsefulLifeDescriptionOfTerm" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_PropertyPlantAndEquipmentUsefulLifeDescriptionOfTerm" substitutionGroup="xbrli:item" />
<element name="LicenseAgreementTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LicenseAgreementTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="FabrylicenseagreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_FabrylicenseagreementMember" substitutionGroup="xbrli:item" />
<element name="Interleukin12LicenseAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_Interleukin12LicenseAgreementMember" substitutionGroup="xbrli:item" />
<element name="SaleOfCystinosisProgramMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_SaleOfCystinosisProgramMember" substitutionGroup="xbrli:item" />
<element name="MPSIILicenseAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_MPSIILicenseAgreementMember" substitutionGroup="xbrli:item" />
<element name="LicenseAgreementLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LicenseAgreementLineItems" substitutionGroup="xbrli:item" />
<element name="MilestonePaymentPaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_MilestonePaymentPaid" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="MilestonePaymentDue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_MilestonePaymentDue" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="AgreementExpirationDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_AgreementExpirationDescription" substitutionGroup="xbrli:item" />
<element name="ClinicalTrialCostRelatedToResearchAndDevelopmentExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ClinicalTrialCostRelatedToResearchAndDevelopmentExpense" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="CollaborativeAgreementExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_CollaborativeAgreementExpenses" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="OptionFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_OptionFee" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="MilestoneFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_MilestoneFees" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="LicenseMaintenanceFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_LicenseMaintenanceFees" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="PaymentsUponClosingOfInitialPublicOffering" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_PaymentsUponClosingOfInitialPublicOffering" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="MilestonePayment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_MilestonePayment" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="LicenseAgreementExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_LicenseAgreementExpenses" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="AgreementExpirationPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_AgreementExpirationPeriod" substitutionGroup="xbrli:item" />
<element name="UpfrontLicenseFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_UpfrontLicenseFees" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="MilestonePaymentToBePaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_MilestonePaymentToBePaid" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="BioMarinPharmaceuticalIncMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_BioMarinPharmaceuticalIncMember" substitutionGroup="xbrli:item" />
<element name="GenstemTherapeuticsIncMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_GenstemTherapeuticsIncMember" substitutionGroup="xbrli:item" />
<element name="LundUniversityRightsHoldersAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LundUniversityRightsHoldersAgreementMember" substitutionGroup="xbrli:item" />
<element name="UniversityOfManchesterAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_UniversityOfManchesterAgreementMember" substitutionGroup="xbrli:item" />
<element name="UHNagreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_UHNagreementMember" substitutionGroup="xbrli:item" />
<element name="SupplementalBalanceSheetInformationDisclosuresAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_SupplementalBalanceSheetInformationDisclosuresAbstract" substitutionGroup="xbrli:item" />
<element name="PrepaidCompensationBenefits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_PrepaidCompensationBenefits" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="TaxIncentiveRefundCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_TaxIncentiveRefundCurrent" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="PrepaidResearchAndDevelopmentCostsCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_PrepaidResearchAndDevelopmentCostsCurrent" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="DisclosureSupplementalBalanceSheetInformationSummaryOfPropertyAndEquipmentNetDetailAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_DisclosureSupplementalBalanceSheetInformationSummaryOfPropertyAndEquipmentNetDetailAbstract" substitutionGroup="xbrli:item" />
<element name="Sales" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_Sales" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="AccruedResearchAndDevelopmentExpenseCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_AccruedResearchAndDevelopmentExpenseCurrent" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="RestrictedCashMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_RestrictedCashMember" substitutionGroup="xbrli:item" />
<element name="OperatingLeaseAnnualIncreaseInRentalPercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_OperatingLeaseAnnualIncreaseInRentalPercentage" substitutionGroup="xbrli:item" />
<element name="AnnualLeasePaymentsDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_AnnualLeasePaymentsDescription" substitutionGroup="xbrli:item" />
<element name="LeaseExpirationMonthAndYear" type="xbrli:gYearMonthItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_LeaseExpirationMonthAndYear" substitutionGroup="xbrli:item" />
<element name="AccountingStandardsUpdateEightFourZeroMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_AccountingStandardsUpdateEightFourZeroMember" substitutionGroup="xbrli:item" />
<element name="DebtDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_DebtDisclosureTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="LegalExpensesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LegalExpensesMember" substitutionGroup="xbrli:item" />
<element name="DebtDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_DebtDisclosureLineItems" substitutionGroup="xbrli:item" />
<element name="LineOfCreditFacilityAdditionalDiscretionary" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_LineOfCreditFacilityAdditionalDiscretionary" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="EndOfTermChargeAsPercentageOnPrincipalAmount" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_EndOfTermChargeAsPercentageOnPrincipalAmount" substitutionGroup="xbrli:item" />
<element name="DebtInstrumentNumberOfTranches" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_DebtInstrumentNumberOfTranches" substitutionGroup="xbrli:item" />
<element name="LineOfCreditFacilityPrepaymentOfPremiumPercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_LineOfCreditFacilityPrepaymentOfPremiumPercentage" substitutionGroup="xbrli:item" />
<element name="LoanAndSecurityAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LoanAndSecurityAgreementMember" substitutionGroup="xbrli:item" />
<element name="TermLoanFacilityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TermLoanFacilityMember" substitutionGroup="xbrli:item" />
<element name="TermLoanPrepaymentDuringFirstYearMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TermLoanPrepaymentDuringFirstYearMember" substitutionGroup="xbrli:item" />
<element name="TermLoanPrepaymentDuringSecondYearMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TermLoanPrepaymentDuringSecondYearMember" substitutionGroup="xbrli:item" />
<element name="TermLoanPrepaymentAfterSecondYearMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TermLoanPrepaymentAfterSecondYearMember" substitutionGroup="xbrli:item" />
<element name="SiliconValleyBankMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_SiliconValleyBankMember" substitutionGroup="xbrli:item" />
<element name="RegulatoryMilestoneMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_RegulatoryMilestoneMember" substitutionGroup="xbrli:item" />
<element name="CommonStockCapitalSharesAmountAvailableForFutureIssuance" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_CommonStockCapitalSharesAmountAvailableForFutureIssuance" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="UndesignatedSharesOfPreferredStockOutstanding" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_UndesignatedSharesOfPreferredStockOutstanding" substitutionGroup="xbrli:item" />
<element name="UndesignatedPreferredStock" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_UndesignatedPreferredStock" substitutionGroup="xbrli:item" />
<element name="NovemberTwoThousandTwentyFollowOnOfferingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_NovemberTwoThousandTwentyFollowOnOfferingMember" substitutionGroup="xbrli:item" />
<element name="FebruaryTwoThousandTwentyFollowOnOfferingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_FebruaryTwoThousandTwentyFollowOnOfferingMember" substitutionGroup="xbrli:item" />
<element name="JulyTwoThousandNineteenFollowOnOfferingMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_JulyTwoThousandNineteenFollowOnOfferingMember" substitutionGroup="xbrli:item" />
<element name="TwoThousandNineteenInducementPlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TwoThousandNineteenInducementPlanMember" substitutionGroup="xbrli:item" />
<element name="TwoThousandTwentyInducementPlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TwoThousandTwentyInducementPlanMember" substitutionGroup="xbrli:item" />
<element name="TwoThousandEighteenStockOptionAndIncentivePlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TwoThousandEighteenStockOptionAndIncentivePlanMember" substitutionGroup="xbrli:item" />
<element name="TwoThousandFifteenStockOptionAndGrantPlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_TwoThousandFifteenStockOptionAndGrantPlanMember" substitutionGroup="xbrli:item" />
<element name="NumberOfSharesOfCommonStockOutstandingIncreasePercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_NumberOfSharesOfCommonStockOutstandingIncreasePercentage" substitutionGroup="xbrli:item" />
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod" substitutionGroup="xbrli:item" />
<element name="IncomeTaxesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_IncomeTaxesTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="ExpirationThrough2037Member" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_ExpirationThrough2037Member" substitutionGroup="xbrli:item" />
<element name="ExpirationThrough2033Member" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_ExpirationThrough2033Member" substitutionGroup="xbrli:item" />
<element name="ExpirationThrough2039Member" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_ExpirationThrough2039Member" substitutionGroup="xbrli:item" />
<element name="OrphanDrugCreditMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_OrphanDrugCreditMember" substitutionGroup="xbrli:item" />
<element name="IncomeTaxesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_IncomeTaxesLineItems" substitutionGroup="xbrli:item" />
<element name="PayrollTaxLiabilityCappedPerYear" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_PayrollTaxLiabilityCappedPerYear" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="TaxCreditCarryforwardsExpirationPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_TaxCreditCarryforwardsExpirationPeriod" substitutionGroup="xbrli:item" />
<element name="OperatingLossAndTaxCreditCarryforwardsLimitationsPeriodOverWhichCumulativeChangesInOwnershipInterestOfSignificantShareholdersConsidered" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_OperatingLossAndTaxCreditCarryforwardsLimitationsPeriodOverWhichCumulativeChangesInOwnershipInterestOfSignificantShareholdersConsidered" substitutionGroup="xbrli:item" />
<element name="OperatingLossAndTaxCreditCarryforwardsLimitationsThresholdPercentageOfCumulativeChangesInOwnershipInterestOfSignificantShareholdersConsidered" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_OperatingLossAndTaxCreditCarryforwardsLimitationsThresholdPercentageOfCumulativeChangesInOwnershipInterestOfSignificantShareholdersConsidered" substitutionGroup="xbrli:item" />
<element name="EffectiveIncomeTaxRateReconciliationPermanentDifference" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_EffectiveIncomeTaxRateReconciliationPermanentDifference" substitutionGroup="xbrli:item" />
<element name="DeferredTaxLiabilitiesRightOfUseAsset" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_DeferredTaxLiabilitiesRightOfUseAsset" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="DeferredTaxAssetsLicenseAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_DeferredTaxAssetsLicenseAgreement" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="LeaseLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_LeaseLiability" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="DeferredTaxAssetsCapitalizedStartUpAndOrganizationalCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_DeferredTaxAssetsCapitalizedStartUpAndOrganizationalCosts" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="RestrictedStockAwardsAndUnitsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_RestrictedStockAwardsAndUnitsMember" substitutionGroup="xbrli:item" />
<element name="SubleaseAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_SubleaseAgreementMember" substitutionGroup="xbrli:item" />
<element name="LicenseAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_LicenseAgreementMember" substitutionGroup="xbrli:item" />
<element name="StockPurchaseAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_StockPurchaseAgreementMember" substitutionGroup="xbrli:item" />
<element name="OfficersAndBoardMembersMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_OfficersAndBoardMembersMember" substitutionGroup="xbrli:item" />
<element name="ProvisionForMaximumCashPayment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="avro_ProvisionForMaximumCashPayment" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="JulyTwoThousandTwentyThreeWorkforceReductionMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_JulyTwoThousandTwentyThreeWorkforceReductionMember" substitutionGroup="xbrli:item" />
<element name="EmployeeSeveranceAndOtherBenefitMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="avro_EmployeeSeveranceAndOtherBenefitMember" substitutionGroup="xbrli:item" />
<element name="CompanyWorkforceReduction" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_CompanyWorkforceReduction" substitutionGroup="xbrli:item" />
<element name="OutstandingRestructuringLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="avro_OutstandingRestructuringLiabilities" substitutionGroup="xbrli:item" xbrli:balance="credit" />
</schema>
