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  <xs:element id="seer_BiotechnologyCompanyMember" abstract="true" name="BiotechnologyCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="seer_LesseeOperatingLeaseAbatementPeriod" abstract="false" name="LesseeOperatingLeaseAbatementPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="seer_NHGrantMember" abstract="true" name="NHGrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="seer_FacilityLeaseAgreementLetterOfCreditMember" abstract="true" name="FacilityLeaseAgreementLetterOfCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="seer_AdjustmentsToAdditionalPaidInCapitalLossesRecognizedInExcessOfRetainedEarnings" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalLossesRecognizedInExcessOfRetainedEarnings" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_OperatingLeaseLeaseIncomeLeasePaymentAtEndOfTerm" abstract="false" name="OperatingLeaseLeaseIncomeLeasePaymentAtEndOfTerm" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_OperatingLeaseAnnualLeaseBaseRentIncreaseDecrease" abstract="false" name="OperatingLeaseAnnualLeaseBaseRentIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_AccruedLiabilitiesResearchAndDevelopmentCostsCurrent" abstract="false" name="AccruedLiabilitiesResearchAndDevelopmentCostsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_LaboratoryMember" abstract="true" name="LaboratoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="seer_AccruedPropertyAndEquipment" abstract="false" name="AccruedPropertyAndEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_ProceedsFromReturnOnProfit" abstract="false" name="ProceedsFromReturnOnProfit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_LeaseAgreementNumberOfSquareFeet" abstract="false" name="LeaseAgreementNumberOfSquareFeet" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="seer_RestrictedStockLiability" abstract="false" name="RestrictedStockLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_PaymentsOfStockIssuanceCostsNet" abstract="false" name="PaymentsOfStockIssuanceCostsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_StockIssuedDuringPeriodValueStockOptionsEarlyExercised" abstract="false" name="StockIssuedDuringPeriodValueStockOptionsEarlyExercised" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_CommonStockVotingRightsPerShare" abstract="false" name="CommonStockVotingRightsPerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="seer_IncreaseDecreaseInAccruedResearchAndDevelopment" abstract="false" name="IncreaseDecreaseInAccruedResearchAndDevelopment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_AccruedCompensation" abstract="false" name="AccruedCompensation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRepurchased" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRepurchased" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="seer_StockholdersEquityReturnOnProfit" abstract="false" name="StockholdersEquityReturnOnProfit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="seer_RelatedPartyMember" abstract="true" name="RelatedPartyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="seer_ComputerEquipmentAndSoftwareMember" abstract="true" name="ComputerEquipmentAndSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
</xs:schema>
