XG GI:213688346 XG glycoprotein isoform 2 precursor 1 meswwglpcl aflcflmhar gqrdfdlada lddpeptkkp nsdiypkpkp 50 51 pyypqpenpd sggniyprpk prpqpqpgns gnsggyfndv drddgryppr 100 101 prprppaggg gggyssygns dnthgrggyr lnsrygntyg gdhhstygnp 150 151 egnmvakivs pivsvvvvtl lgaaasyfkl nnrrncfrth epenv