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  <xs:element id="cbus_EffectiveIncomeTaxRateReconciliationInvestmentInSubsidiaryPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationInvestmentInSubsidiaryPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cbus_EffectiveIncomeTaxRateReconciliationSection382LimitationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationSection382LimitationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cbus_EffectiveIncomeTaxRateReconciliation743bAssetAndAmortizationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliation743bAssetAndAmortizationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cbus_OperatingLossCarryforwardsNotSubjectToExpiration" abstract="false" name="OperatingLossCarryforwardsNotSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_OperatingLossCarryforwardsSubjectToExpiration" abstract="false" name="OperatingLossCarryforwardsSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_DeferredTaxAssetTaxAttributeDecreaseDueToSection382Limitation" abstract="false" name="DeferredTaxAssetTaxAttributeDecreaseDueToSection382Limitation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_DeferredTaxAssetsLeasingArrangements" abstract="false" name="DeferredTaxAssetsLeasingArrangements" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_DeferredTaxAssetsRoyaltyLiability" abstract="false" name="DeferredTaxAssetsRoyaltyLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_RosevilleMnLeaseMember" abstract="true" name="RosevilleMnLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_SanDiegoCaliforniaLaboratoryLeaseMember" abstract="true" name="SanDiegoCaliforniaLaboratoryLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_SanDiegoCaliforniaHeadquartersLeaseMember" abstract="true" name="SanDiegoCaliforniaHeadquartersLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_SanDiegoCaliforniaGreenhouseLeaseMember" abstract="true" name="SanDiegoCaliforniaGreenhouseLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_OtherLeasesMember" abstract="true" name="OtherLeasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_GreenhouseLeaseMember" abstract="true" name="GreenhouseLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_WarehouseLeaseMember" abstract="true" name="WarehouseLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cbus_LesseeOperatingLeaseNumberOfRenewalOptions" abstract="false" name="LesseeOperatingLeaseNumberOfRenewalOptions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cbus_CharitableContributionObligationPercentageOfNetRoyaltyRevenueIfThresholdIsExceeded" abstract="false" name="CharitableContributionObligationPercentageOfNetRoyaltyRevenueIfThresholdIsExceeded" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="cbus_CharitableContributionObligationNetRoyaltyRevenueThreshold" abstract="false" name="CharitableContributionObligationNetRoyaltyRevenueThreshold" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_FinanceLeaseCost" abstract="false" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_RelatedPartyTransactionTwelveMonthRevenueThreshold" abstract="false" name="RelatedPartyTransactionTwelveMonthRevenueThreshold" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_RelatedPartyTransactionTerm" abstract="false" name="RelatedPartyTransactionTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cbus_RelatedPartyTransactionRenewalTerm" abstract="false" name="RelatedPartyTransactionRenewalTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cbus_RelatedPartyTransactionRequiredPaymentToExtendAgreement" abstract="false" name="RelatedPartyTransactionRequiredPaymentToExtendAgreement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_AccruedRoyaltiesMeasurementInput" abstract="false" name="AccruedRoyaltiesMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="cbus_RelatedPartyTransactionRoyaltyPaymentsUnpaid" abstract="false" name="RelatedPartyTransactionRoyaltyPaymentsUnpaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_AccruedRoyaltiesRollForward" abstract="true" name="AccruedRoyaltiesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cbus_AccruedFieldTrialsCurrent" abstract="false" name="AccruedFieldTrialsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired" abstract="false" name="NoncashOrPartNoncashAcquisitionFixedAssetsAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_UnpaidStockOfferingCostsIncludedInAccountsPayable" abstract="false" name="UnpaidStockOfferingCostsIncludedInAccountsPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_ReclassificationOfWarrantLiabilityToEquity" abstract="false" name="ReclassificationOfWarrantLiabilityToEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_NonCashPurchaseOfInsuranceThroughVendorFinancing" abstract="false" name="NonCashPurchaseOfInsuranceThroughVendorFinancing" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_ProctorGambleMember" abstract="true" name="ProctorGambleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
