Immunogen sequence: ETQSVSSFSS GPTSPSEMPD QFPAVVRPGS LDLPSPVSLS EFGMMFPVLG PRSECSGASS PECEVERGDR AEGAENKTSD KANNNRG Highest antigen sequence identity to the following orthologs: Mouse - 95%, Rat - 95%. Inhibits the auto- and transphosphorylation activity