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  <xsd:element name="DocumentAndEntityInformationAbstract" id="lbio_DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="WorkingCapital" id="lbio_WorkingCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract1Abstract" id="lbio_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract1Abstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm" id="lbio_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="AggregateIntrinsicValueAbstract" id="lbio_AggregateIntrinsicValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfRoyaltyOnSales" id="lbio_PercentageOfRoyaltyOnSales" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="EstimatedBenchmarkPaymentsForProducts" id="lbio_EstimatedBenchmarkPaymentsForProducts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ManufacturingServiceAgreementMember" id="lbio_ManufacturingServiceAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageRemainingContractualTerm" id="lbio_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="AggregateIntrinsicValueAbstract1Abstract" id="lbio_AggregateIntrinsicValueAbstract1Abstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfIncreaseInLeaseRent" id="lbio_PercentageOfIncreaseInLeaseRent" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="SeriesConvertiblePreferredStockMember" id="lbio_SeriesConvertiblePreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromIssuanceOfCommonStockUponConversionOfWarrants" id="lbio_ProceedsFromIssuanceOfCommonStockUponConversionOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CradaMember" id="lbio_CradaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NCIMember" id="lbio_NCIMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PerQuarterMember" id="lbio_PerQuarterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PerYearMember" id="lbio_PerYearMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NIHMember" id="lbio_NIHMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="OvarianCancerMember" id="lbio_OvarianCancerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="BreastCancerMember" id="lbio_BreastCancerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ColorectalCancerMember" id="lbio_ColorectalCancerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="UpfrontLicenseFee" id="lbio_UpfrontLicenseFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="MelanomaMember" id="lbio_MelanomaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermPurchaseCommitmentPercentage" id="lbio_LongTermPurchaseCommitmentPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="VestingFirstMember" id="lbio_VestingFirstMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PlanOneMember" id="lbio_PlanOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PlanTwoMember" id="lbio_PlanTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CashMoneyMarketFundsAndShortTermInvestments" id="lbio_CashMoneyMarketFundsAndShortTermInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="FiveCompaniesMember" id="lbio_FiveCompaniesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="VariousOtherDomesticIssuersMember" id="lbio_VariousOtherDomesticIssuersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignIssuerMember" id="lbio_ForeignIssuerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationsAndForfeituresInPeriodIntrinsicValue" id="lbio_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationsAndForfeituresInPeriodIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ResearchCollaborationAgreementMember" id="lbio_ResearchCollaborationAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ExclusivePatentLicenseAgreementMember" id="lbio_ExclusivePatentLicenseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="MoneyMarketFundsAndShortTermInvestmentsWeightedAverageTimeToMaturity" id="lbio_MoneyMarketFundsAndShortTermInvestmentsWeightedAverageTimeToMaturity" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="MoneyMarketFundsAndShortTermInvestmentsPercentageMaturingFirst" id="lbio_MoneyMarketFundsAndShortTermInvestmentsPercentageMaturingFirst" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="MoneyMarketFundsAndShortTermInvestmentsPercentageMaturingFirstPeriod" id="lbio_MoneyMarketFundsAndShortTermInvestmentsPercentageMaturingFirstPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="ReclassificationOfStockBasedCompensationCost" id="lbio_ReclassificationOfStockBasedCompensationCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>
