Immunogen sequence: WEGRANGISN PEKWCPKDFG VRYNCHQEIR LKKNPIAERK SKNLDVTSRE NVGLDINENT KSHDQSENEN KKHEYDDTHF FKNESESNWV CSRVKEIESC KED Highest antigen sequence identity to the following orthologs: Mouse - 44%, Rat - 47%. Guanine nucleotide exchange factor