| UniProtSummary | FUNCTION:SwissProt:P55211#Isoform2lacksactivityisandominant-negativeinhibitorofcaspase-9. SIZE:416aminoacids;46281Da
 SUBUNIT:Heterotetramerthatconsistsoftwoanti-parallelarrangedheterodimers,eachoneformedbya35kDa(p35)anda10kDa(p10)subunit.Caspase-9andAPAF1bindtoeachotherviatheirrespectiveNH2-terminalCED-3homologousdomainsinthepresenceofcytochromeCandATP.InteractswiththeinhibitorsBIRC2,BIRC4,BIRC5andBIRC7.
 TISSUESPECIFICITY:Ubiquitous,withhighestexpressionintheheart,moderateexpressioninliver,skeletalmuscle,andpancreas.Lowlevelsinallothertissues.
 PTM:CleavagesatAsp-315bygranzymeBandatAsp-330bycaspase-3generatethetwoactivesubunits.Caspase-8and-10canalsobeinvolvedintheseprocessingevents.
 SIMILARITY:SwissProt:P55211##BelongstothepeptidaseC14family.&Contains1CARDdomain.
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