RLN2 GI:20143935 relaxin 2 isoform 2 1 mprlfffhll gvclllnqfs ravadswmee viklcgrelv raqiaicgms 50 51 twskrslsqe dapqtprpva gdfiqtvslg ispdggkalr tgscftrefl 100 101 galsklchps stkiqkp