SMAD3 GI:223029444 mothers against decapentaplegic homolog 3 isoform 4 1 mnhsmdagsp nlspnpmspa hnnldlqpvt ycepafwcsi syyelnqrvg 50 51 etfhasqpsm tvdgftdpsn serfclglls nvnrnaavel trrhigrgvr 100 101 lyyiggevfa eclsdsaifv qspncnqryg whpatvckip pgcnlkifnn 150 151 qefaallaqs vnqgfeavyq ltrmctirms fvkgwgaeyr rqtvtstpcw 200 201 ielhlngplq wldkvltqmg spsircssvs