Phosphatidylinositol glycan anchor biosynthesis class Q XSACRVFKLW PLSFLGSKLS TCEQLRHRLE HLTLIFSTRK AENPAQLMRK ANTVASVLLD VALGLMLLSW LHGRSRIGHL ADALVPVADH VAEELQHLLQ WLMGAPAGLK MNRALDQAVL PEDPWPVLTV ASVPGEEVER SAPARGLLFL