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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount" xlink:label="us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount" xlink:label="us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" priority="1" use="optional"/> |
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| <definitionLink xlink:role="http://www.ymabs.com/role/DisclosureProductRevenueDiscountsAndAllowancesDetails" xlink:type="extended" xlink:title="40401 - Disclosure - PRODUCT REVENUE - Discounts and Allowances (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="us-gaap_DisaggregationOfRevenueTable"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="srt_ProductOrServiceAxis"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="srt_ProductOrServiceAxis" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductsAndServicesDomain" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductMember" xlink:label="us-gaap_ProductMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ProductsAndServicesDomain" xlink:to="us-gaap_ProductMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ProductDanyelzaMember" xlink:label="ymab_ProductDanyelzaMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="us-gaap_ProductMember" xlink:to="ymab_ProductDanyelzaMember" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="us-gaap_BalanceSheetLocationAxis" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_FinancialStatementAccountsReceivableMember" xlink:label="ymab_FinancialStatementAccountsReceivableMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="ymab_FinancialStatementAccountsReceivableMember" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_FinancialStatementAccruedLiabilitiesMember" xlink:label="ymab_FinancialStatementAccruedLiabilitiesMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="ymab_FinancialStatementAccruedLiabilitiesMember" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="us-gaap_DisaggregationOfRevenueLineItems"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_DisaggregationOfRevenueTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ReservesForDiscountsAndAllowancesRollForward" xlink:label="ymab_ReservesForDiscountsAndAllowancesRollForward"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ymab_ReservesForDiscountsAndAllowancesRollForward" xlink:to="ymab_ReserveForDiscountsBalance" priority="1" use="optional"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ContractualAllowanceAndGovernmentRebateLiabilityBalance" xlink:label="ymab_ContractualAllowanceAndGovernmentRebateLiabilityBalance"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_SalesReturnLiabilityBalance" xlink:label="ymab_SalesReturnLiabilityBalance"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ReservesAndAllowancesBalance" xlink:label="ymab_ReservesAndAllowancesBalance"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ReservesAndAllowancesAdditions" xlink:label="ymab_ReservesAndAllowancesAdditions"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ReservesAndAllowancesReductions" xlink:label="ymab_ReservesAndAllowancesReductions"/> |
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| <definitionLink xlink:role="http://www.ymabs.com/role/DisclosureProductRevenueConcentrationsDetails" xlink:type="extended" xlink:title="40402 - Disclosure - PRODUCT REVENUE - Concentrations (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTable" xlink:label="us-gaap_ConcentrationRiskTable"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_MckessonMember" xlink:label="ymab_MckessonMember"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_AsdMember" xlink:label="ymab_AsdMember"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_CardinalHealthMember" xlink:label="ymab_CardinalHealthMember"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerMember" xlink:label="us-gaap_RevenueFromContractWithCustomerMember"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ProductsAndServicesDomain" xlink:to="us-gaap_ProductMember" use="optional"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_ConcentrationRiskTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_ConcentrationRiskPercentage1" priority="1" use="optional"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_InventoryCurrentAndNoncurrentLineItems" xlink:label="ymab_InventoryCurrentAndNoncurrentLineItems"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ymab_InventoryCurrentAndNoncurrentLineItems" xlink:to="us-gaap_InventoryFinishedGoodsNetOfReserves" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_InventoryCurrentAndNoncurrent" xlink:label="ymab_InventoryCurrentAndNoncurrent"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_InventoryNet" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="us-gaap_AssetsNoncurrentAbstract"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ymab_InventoryCurrentAndNoncurrentLineItems" xlink:to="us-gaap_AssetsNoncurrentAbstract" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNoncurrent" xlink:label="us-gaap_InventoryNoncurrent"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_InventoryNoncurrent" priority="1" use="optional"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_MskLicenseAgreementMember" xlink:label="ymab_MskLicenseAgreementMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="us-gaap_NoncollaborativeArrangementTransactionsMember" xlink:to="ymab_MskLicenseAgreementMember" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_Cd33LicenseAgreementMember" xlink:label="ymab_Cd33LicenseAgreementMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_NoncollaborativeArrangementTransactionsMember" xlink:to="ymab_Cd33LicenseAgreementMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_SublicenseAgreementMember" xlink:label="ymab_SublicenseAgreementMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="us-gaap_NoncollaborativeArrangementTransactionsMember" xlink:to="ymab_SublicenseAgreementMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_SadaLicenseAgreementMember" xlink:label="ymab_SadaLicenseAgreementMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="us-gaap_NoncollaborativeArrangementTransactionsMember" xlink:to="ymab_SadaLicenseAgreementMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_MskMember" xlink:label="ymab_MskMember"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_NumberOfLicenseAgreements" xlink:label="ymab_NumberOfLicenseAgreements"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:to="ymab_NumberOfLicenseAgreements" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_FinancialStatementInformationAbstract" xlink:label="ymab_FinancialStatementInformationAbstract"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingCostsAndExpenses" xlink:label="us-gaap_OperatingCostsAndExpenses"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_MilestonesAbstract" xlink:label="ymab_MilestonesAbstract"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ArrangementOtherThanCollaborativeClinicalMilestonePaymentsDueAccruedLiabilitiesCurrent" xlink:label="ymab_ArrangementOtherThanCollaborativeClinicalMilestonePaymentsDueAccruedLiabilitiesCurrent"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ArrangementOtherThanCollaborativeTimeBasedMilestoneAccrualPeriod" xlink:label="ymab_ArrangementOtherThanCollaborativeTimeBasedMilestoneAccrualPeriod"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_CoreFacilityServiceAgreementMember" xlink:label="ymab_CoreFacilityServiceAgreementMember"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:to="ymab_ArrangementOtherThanCollaborativeNumberOfServiceAgreements" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_ArrangementOtherThanCollaborativeResearchServicePeriod" xlink:label="ymab_ArrangementOtherThanCollaborativeResearchServicePeriod"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:to="ymab_ArrangementOtherThanCollaborativeResearchServicePeriod" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:to="us-gaap_ResearchAndDevelopmentExpense" priority="1" use="optional"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LeaseArrangementManufacturingFacilityIndianaMember" xlink:label="ymab_LeaseArrangementManufacturingFacilityIndianaMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="ymab_LeaseArrangementManufacturingFacilityIndianaMember" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LeaseArrangementLaboratoryNewJerseyMember" xlink:label="ymab_LeaseArrangementLaboratoryNewJerseyMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="ymab_LeaseArrangementLaboratoryNewJerseyMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LeaseArrangementCorporateHeadquartersNewYorkMember" xlink:label="ymab_LeaseArrangementCorporateHeadquartersNewYorkMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="ymab_LeaseArrangementCorporateHeadquartersNewYorkMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LeaseArrangementOfficeSpaceDenmarkMember" xlink:label="ymab_LeaseArrangementOfficeSpaceDenmarkMember"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="ymab_LeaseArrangementOfficeSpaceDenmarkMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AreaOfRealEstateProperty" xlink:label="us-gaap_AreaOfRealEstateProperty"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_AreaOfRealEstateProperty" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_AreaOfRealEstatePropertyAdditionalArea" xlink:label="ymab_AreaOfRealEstatePropertyAdditionalArea"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="ymab_AreaOfRealEstatePropertyAdditionalArea" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeOperatingLeaseTermOfContract" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LesseeOperatingLeaseInitialFeeAndAccessFee" xlink:label="ymab_LesseeOperatingLeaseInitialFeeAndAccessFee"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LesseeOperatingLeaseMonthlyAccessFee" xlink:label="ymab_LesseeOperatingLeaseMonthlyAccessFee"/> |
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| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LesseeOperatingLeaseAdditionalAccessFee" xlink:label="ymab_LesseeOperatingLeaseAdditionalAccessFee"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="ymab_LesseeOperatingLeaseAdditionalAccessFee" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeOperatingLeaseRenewalTerm" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_FixedRentPayablePerAnnum" xlink:label="ymab_FixedRentPayablePerAnnum"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="ymab_FixedRentPayablePerAnnum" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="ymab-20220331.xsd#ymab_LeasePayablePerMonth" xlink:label="ymab_LeasePayablePerMonth"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="ymab_LeasePayablePerMonth" priority="1" use="optional"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_IncomeStatementLocationAxis" use="optional"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="us-gaap_OperatingLeaseCost"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseCost" priority="1" use="optional"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:label="us-gaap_OperatingLeasePayments"/> |
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