XG GI:28212220 XG glycoprotein isoform 1 precursor 1 meswwglpcl aflcflmhar gqrdfdlada lddpeptkkp nsdiypkpkp 50 51 pyypqpenpd sggniyprpk prpqpqpgns gnsggyfndv drddgryppr 100 101 prprppaggg gggyssygns dnthggdhhs tygnpegnmv akivspivsv 150 151 vvvtllgaaa syfklnnrrn cfrthepenv