Immunogen sequence: LVTGESLERL RRGLAAGTSN PDPPTVSTDQ LLPLGGGRDR KVRDLQEADL DLLRVTLSSK PQALATPNKE EHGKRKKKGK GLGKKRDPCL RKYKDFCIHG ECKYVKELRA PSCICHPGYH GERCHGLSLP VENRLYTYDH T. HBEGF is a growth factor that mediates its effects via EGFR, ERBB2 and ERBB4.