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  <xs:element id="bbio_RevenueRemainingPerformanceObligationSalesMilestonePayment" abstract="false" name="RevenueRemainingPerformanceObligationSalesMilestonePayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_RevenueRemainingPerformanceObligationRegulatoryMilestonePayment" abstract="false" name="RevenueRemainingPerformanceObligationRegulatoryMilestonePayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_ContractWithCustomerTerminationOfAgreementNoticePeriod" abstract="false" name="ContractWithCustomerTerminationOfAgreementNoticePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bbio_NumberOfPerformanceObligations" abstract="false" name="NumberOfPerformanceObligations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bbio_RevenueRemainingPerformanceObligationUpfrontPayment" abstract="false" name="RevenueRemainingPerformanceObligationUpfrontPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_RevenueRoyaltyPercentage" abstract="false" name="RevenueRoyaltyPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_StanfordLicenseAgreementMember" abstract="true" name="StanfordLicenseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_PotentialMilestonePayments" abstract="false" name="PotentialMilestonePayments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_NonRoyaltyRevenuePercentageOfRevenueFromSublicenseesTerm" abstract="false" name="NonRoyaltyRevenuePercentageOfRevenueFromSublicenseesTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bbio_LicenseFees" abstract="false" name="LicenseFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementTable" abstract="true" name="PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bbio_TwoThousandTwentyThreeShelfRegistrationStatementAndATMAgreementMember" abstract="true" name="TwoThousandTwentyThreeShelfRegistrationStatementAndATMAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_TwoThousandTwentySixShelfRegistrationStatementAndATMAgreementMember" abstract="true" name="TwoThousandTwentySixShelfRegistrationStatementAndATMAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_TwoThousandTwentySixShareRepurchaseProgramMember" abstract="true" name="TwoThousandTwentySixShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementLineItems" abstract="true" name="PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bbio_SaleOfStockAggregateOfferingAmount" abstract="false" name="SaleOfStockAggregateOfferingAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_PercentageOfCommissionsOnGrossProceedsOfSalesOfCommonStock" abstract="false" name="PercentageOfCommissionsOnGrossProceedsOfSalesOfCommonStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_SaleOfStockStockRemainingEligibleToBeSoldAmount" abstract="false" name="SaleOfStockStockRemainingEligibleToBeSoldAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bbio_ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable" abstract="true" name="ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bbio_EmployeeAndNonEmployeeServiceShareBasedCompensationLineItems" abstract="true" name="EmployeeAndNonEmployeeServiceShareBasedCompensationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bbio_UnvestedRestrictedStockUnitMember" abstract="true" name="UnvestedRestrictedStockUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_UnvestedPerformanceBasedRestrictedStockUnitMember" abstract="true" name="UnvestedPerformanceBasedRestrictedStockUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_UnvestedMarketBasedRestrictedStockUnitMember" abstract="true" name="UnvestedMarketBasedRestrictedStockUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_CommonStockOptionsIssuedAndOutstandingMember" abstract="true" name="CommonStockOptionsIssuedAndOutstandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember" abstract="true" name="EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_EstimatedSharesIssuableEmployeeStockPurchasePlanMember" abstract="true" name="EstimatedSharesIssuableEmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_AssumedConversionOfTwoThousandTwentySevenNotesMember" abstract="true" name="AssumedConversionOfTwoThousandTwentySevenNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_AssumedConversionOfTwoThousandTwentyNineNotesMember" abstract="true" name="AssumedConversionOfTwoThousandTwentyNineNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_AssumedConversionOfTwoThousandThirtyOneNotesMember" abstract="true" name="AssumedConversionOfTwoThousandThirtyOneNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_AssumedConversionOfTwoThousandThirtyThreeNotesMember" abstract="true" name="AssumedConversionOfTwoThousandThirtyThreeNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_InvestmentAgreementMember" abstract="true" name="InvestmentAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_SixthStreetPurchaserMember" abstract="true" name="SixthStreetPurchaserMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_HCRPurchaserMember" abstract="true" name="HCRPurchaserMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRateComponentAxis" abstract="true" name="VariableRateComponentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bbio_VariableRateComponentDomain" abstract="true" name="VariableRateComponentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRateSeventhAnniversaryMember" abstract="true" name="VariableRateSeventhAnniversaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRateEighthAnniversaryAndEndOfEachThirdMonthThereafterMember" abstract="true" name="VariableRateEighthAnniversaryAndEndOfEachThirdMonthThereafterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRateTriggeringEventMember" abstract="true" name="VariableRateTriggeringEventMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRateChangeOfControlTransactionMember" abstract="true" name="VariableRateChangeOfControlTransactionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableConversionPriceComponentAxis" abstract="true" name="VariableConversionPriceComponentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bbio_VariableConversionPriceComponentDomain" abstract="true" name="VariableConversionPriceComponentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableConversionPriceClosingDateMember" abstract="true" name="VariableConversionPriceClosingDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableConversionPriceOnAndAfterFifthAnniversaryMember" abstract="true" name="VariableConversionPriceOnAndAfterFifthAnniversaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRedemptionPriceComponentAxis" abstract="true" name="VariableRedemptionPriceComponentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bbio_VariableRedemptionPriceComponentDomain" abstract="true" name="VariableRedemptionPriceComponentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRedemptionAfterThirdAnniversaryMember" abstract="true" name="VariableRedemptionAfterThirdAnniversaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_VariableRedemptionAfterFourthAnniversaryMember" abstract="true" name="VariableRedemptionAfterFourthAnniversaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_SeriesACumulativeConvertibleParticipatingPreferredStockMember" abstract="true" name="SeriesACumulativeConvertibleParticipatingPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bbio_PreferredStockDividendPaymentVariableRate" abstract="false" name="PreferredStockDividendPaymentVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bbio_PreferredStockDividendRateMaximumPercentage" abstract="false" name="PreferredStockDividendRateMaximumPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockThresholdPercentageOfStockPriceTrigger" abstract="false" name="ConvertiblePreferredStockThresholdPercentageOfStockPriceTrigger" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockThresholdTradingDays" abstract="false" name="ConvertiblePreferredStockThresholdTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockThresholdConsecutiveTradingDays" abstract="false" name="ConvertiblePreferredStockThresholdConsecutiveTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockBeneficialOwnershipLimitationPercentage" abstract="false" name="ConvertiblePreferredStockBeneficialOwnershipLimitationPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockRedemptionPricePercentage" abstract="false" name="ConvertiblePreferredStockRedemptionPricePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockRedemptionPriceAdditionalPercentage" abstract="false" name="ConvertiblePreferredStockRedemptionPriceAdditionalPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockRedemptionPriceMaximumNumberOfQuartersExcludingCashDividendPayments" abstract="false" name="ConvertiblePreferredStockRedemptionPriceMaximumNumberOfQuartersExcludingCashDividendPayments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockRedemptionPriceInternalPreTaxRate" abstract="false" name="ConvertiblePreferredStockRedemptionPriceInternalPreTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_ConvertiblePreferredStockRedemptionPricePercentageOfOriginalIssuePrice" abstract="false" name="ConvertiblePreferredStockRedemptionPricePercentageOfOriginalIssuePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bbio_NeilKumarMember" abstract="true" name="NeilKumarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
