Immunogen sequence: SFRKSTVEHFS RSFKETTNRW VKNTEDLQCY VKPTKNMSPK EQFWGRQVLR RSAGRAPYQE NDGYCPDLEL SDSEAESDGN KE Highest antigen sequence identity to the following orthologs - mouse 75%, rat 75%. This gene is part of a gene cluster on chromosome Xp11.23.