The v-erbB oncogene transforms avian fibroblasts and erythroblasts in culture and induces sarcomas and erythroleukemias in chickens. It is a truncated and mutated version of the receptor for epidermal growth factor. ATP + L-tyrosyl-[protein] = ADP + H(+) + O-phospho-L-tyrosyl-[protein] Belongs to the protein kinase superfamily. Tyr protein kinase family. EGF receptor subfamily.