IGF1 GI:163659901 insulin-like growth factor 1 isoform 2 preproprotein 1 mitptvkmht mssshlfyla lclltftssa tagpetlcga elvdalqfvc 50 51 gdrgfyfnkp tgygsssrra pqtgivdecc frscdlrrle mycaplkpak 100 101 sarsvraqrh tdmpktqkev hlknasrgsa gnknyrm