Immunogen sequence: HIELDRVSSI YPEDLMQIVS HMDSLDNHRC RGDLTKTYSL EAYDNWFNCL SMLVATEVCR VVKKKHRTRM Highest antigen sequence identity to the following orthologs: Mouse - 91%, Rat - 93%. Guanine nucleotide exchange factor (GEF) with specificity for RAP2A, KR