Immunogen sequence: EPVKEEAKTSN PTSSLTSLSV APTFSPNITL GPTYLTTVNS SDSDNGTTRT ASTNSIGITI SPNGTWLPDN QFTDARTEPW EGNSSTAATT PETFPP Highest antigen sequence identity to the following orthologs - mouse 80%, rat 80%. Phosphorylation of receptors by protein kina