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        <link:definition>0211 - Disclosure - Partners' Capital of the Operating Partnership</link:definition>
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        <link:definition>0209 - Disclosure - Investments in Unconsolidated Joint Ventures</link:definition>
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        <link:definition>0208 - Disclosure - Noncontrolling Interests in the Operating Partnership</link:definition>
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        <link:definition>0206 - Disclosure - Debt of the Operating Partnership</link:definition>
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        <link:definition>0204 - Disclosure - Development Profits, Gains from Sale or Contribution of Real Estate Interests and Discontinued Operations</link:definition>
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  <element id="amb_ForfeitureOfCommonLimitedPartnershipUnitsInConnectionWithForfeitureOfStockUnits" name="ForfeitureOfCommonLimitedPartnershipUnitsInConnectionWithForfeitureOfStockUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="amb_DevelopmentProfitsNetOfTaxesDiscontinuedOperations" name="DevelopmentProfitsNetOfTaxesDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="amb_ProceedsReceivableForInsuredRealEstateLoss" name="ProceedsReceivableForInsuredRealEstateLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="amb_MergerTransactionCosts" name="MergerTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="amb_NonCashStockOptionExercises" name="NonCashStockOptionExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="amb_ForfeitureOfStock" name="ForfeitureOfStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="amb_ForfeitureOfStockValue" name="ForfeitureOfStockValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="amb_ForfeitureOfStockShares" name="ForfeitureOfStockShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="amb_ForfeitureOfCommonLimitedPartnershipUnitsInConnectionWithForfeitureOfStock" name="ForfeitureOfCommonLimitedPartnershipUnitsInConnectionWithForfeitureOfStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
</schema>
