Transforming growth factor alpha XPPVAAAVVS HFNDCPDSHT QFCFHGTCRF LVQEDKPACV CHSGYVGARC EHADLLAVVA ASQKKQAITA LVVVSIVALA VLIITCVLIH CCQVRKHCEW CRALICRHEK PSALLKGRTA CCHSETGCRL Y