Immunogen sequence: MNASLESLYS ACSMQSDTVP LLQNGQHARS QPRASGPPRS IQPQVSPRQR VQRSQPVHIL AVRRLQEEDQ QFRTSSLPAI. GRB7, a SH2 domain protein, has a single SH2 domain at its C-terminal, a central region with similarity to Ras GAP, and a proline-rich N terminus