GREM2 GI:71164892 gremlin 2 precursor 1 mfwklslslf lvavlvkvae arknrpagai pspykdgssn nserwqhqik 50 51 evlassqeal vvterkylks dwcktqplrq tvseegcrsr tilnrfcygq 100 101 cnsfyiprhv kkeeesfqsc afckpqrvts vlvelecpgl dppfrlkkiq 150 151 kvkqcrcmsv nlsdsdkq