IGF1 GI:163659899 insulin-like growth factor 1 isoform 1 preproprotein 1 mgkisslptq lfkccfcdfl kvkmhtmsss hlfylalcll tftssatagp 50 51 etlcgaelvd alqfvcgdrg fyfnkptgyg sssrrapqtg ivdeccfrsc 100 101 dlrrlemyca plkpaksars vraqrhtdmp ktqkyqppst nkntksqrrk 150 151 gstfeerk