Immunogen sequence: TGTPTRTPSR TAPGALTAKP PLAPKPGTTV ASGVTARSAS GQVTGGHGAA AATSASAGQA PEDPSGPGTG PSGTCEAPVA VV Highest antigen sequence identity to the following orthologs: Mouse - 80%, Rat - 82%. Acts as GTPase-activating protein for RAB3A, RAB22A, RAB2