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<element name="AgreedToShareMaximumAmountDevelopmentCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_AgreedToShareMaximumAmountDevelopmentCost" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="AdditionalSharesOfCommonStockIssued" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_AdditionalSharesOfCommonStockIssued" substitutionGroup="xbrli:item" />
<element name="PublicOfferingMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_PublicOfferingMember" substitutionGroup="xbrli:item" />
<element name="WarrantsToPurchaseCommonStockMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_WarrantsToPurchaseCommonStockMember" substitutionGroup="xbrli:item" />
<element name="OptionsToPurchaseCommonStockMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_OptionsToPurchaseCommonStockMember" substitutionGroup="xbrli:item" />
<element name="AvailableForSaleSecuritiesMaturityTerm" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_AvailableForSaleSecuritiesMaturityTerm" substitutionGroup="xbrli:item" />
<element name="AccruedExpensesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_AccruedExpensesTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="AccruedExpensesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_AccruedExpensesLineItems" substitutionGroup="xbrli:item" />
<element name="AccruedResearchAndDevelopmentExpensesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_AccruedResearchAndDevelopmentExpensesCurrent" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="AccuredGeneralAndAdministrativeExpensesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_AccuredGeneralAndAdministrativeExpensesCurrent" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodTotalIntrinsicValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodTotalIntrinsicValue" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodTotalIntrinsicValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodTotalIntrinsicValue" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems" substitutionGroup="xbrli:item" />
<element name="StockholdersEquityNoteTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_StockholdersEquityNoteTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="StockholdersEquityNoteLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_StockholdersEquityNoteLineItems" substitutionGroup="xbrli:item" />
<element name="FutureStockBasedCompensationExpenseCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_FutureStockBasedCompensationExpenseCurrent" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="FutureStockBasedCompensationExpenseYearTwo" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_FutureStockBasedCompensationExpenseYearTwo" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="FutureStockBasedCompensationExpenseYearThree" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_FutureStockBasedCompensationExpenseYearThree" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="FutureStockBasedCompensationExpenseYearFour" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_FutureStockBasedCompensationExpenseYearFour" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="Futurestockbasedcompensationexpenseyearfive" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_Futurestockbasedcompensationexpenseyearfive" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="FutureStockBasedCompensationExpenseTotal" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="asmb_FutureStockBasedCompensationExpenseTotal" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="ClassOfWarrantOrRightOutstandingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_ClassOfWarrantOrRightOutstandingAbstract" substitutionGroup="xbrli:item" />
<element name="WeightedAverageGrantDateFairValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_WeightedAverageGrantDateFairValueAbstract" substitutionGroup="xbrli:item" />
<element name="PlanAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_PlanAxis" substitutionGroup="xbrldt:dimensionItem" />
<element name="PlanDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_PlanDomain" substitutionGroup="xbrli:item" />
<element name="TwoThousandEighteenEmployeeStockPurchasePlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_TwoThousandEighteenEmployeeStockPurchasePlanMember" substitutionGroup="xbrli:item" />
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedInPeriodFairValue1" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedInPeriodFairValue1" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="DescriptionOfAgreeToShareDevelopmentCost" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_DescriptionOfAgreeToShareDevelopmentCost" substitutionGroup="xbrli:item" />
<element name="ProceedsFromUpfrontPayment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_ProceedsFromUpfrontPayment" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="CostOfReimbursableExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_CostOfReimbursableExpenses" substitutionGroup="xbrli:item" xbrli:balance="debit" />
<element name="CommitmentsAndContingenciesDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_CommitmentsAndContingenciesDisclosureTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="EquipmentLeaseMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_EquipmentLeaseMember" substitutionGroup="xbrli:item" />
<element name="CommitmentsAndContingenciesDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="asmb_CommitmentsAndContingenciesDisclosureLineItems" substitutionGroup="xbrli:item" />
<element name="OperatingLeaseExpirationYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="asmb_OperatingLeaseExpirationYear" substitutionGroup="xbrli:item" />
</schema>
