Immunogen sequence: GYVWSGKKLSW SKKSESYSDA ETVNGIEKTE VSLRNQERKH SCSSIELDLD HSCGHRFLGR SLKQKLQDAV GQCFPIKNCS SRHSS Highest antigen sequence identity to the following orthologs - mouse 80%, rat 78%. The protein encoded by this gene contains a SH2 domain a