Immunogen sequence: PRTAPRQEKH ERTHEIIPIN VNNNYEHRHT SHLGHAVLPS NARGPILSRS TSTGSAASSG SNSSASSEQG LLGRSPP Highest antigen sequence identity to the following orthologs: Mouse - 77%, Rat - 74%. Sprouty-1 and -2 are membrane-anchored phosphoprotein inhibitor