FUNCTION: Part of the glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex that catalyzes the transfer of N-acetylglucosamine from UDP-N-acetylglucosamine to phosphatidylinositol and participates in the first step of GPI biosynthesis. {ECO:0000269|PubMed:10944123, ECO:00002...
                        FUNCTION: Part of the glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex that catalyzes the transfer of N-acetylglucosamine from UDP-N-acetylglucosamine to phosphatidylinositol and participates in the first step of GPI biosynthesis. {ECO:0000269|PubMed:10944123, ECO:0000269|PubMed:16162815, ECO:0000269|PubMed:28334793}.
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                        GO - Biological processes (BP): 
                        GPI anchor biosynthetic process [GO:0006506]...
                        GPI anchor biosynthetic process [GO:0006506]
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                        GO - Molecular function (MF): 
                        phosphatidylinositol N-acetylglucosaminyltransferase activity [GO:0017176]...
                        phosphatidylinositol N-acetylglucosaminyltransferase activity [GO:0017176]
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                        GO - Cellular component (CC): 
                        endoplasmic reticulum membrane [GO:0005789]; glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex [GO:0000506]; integral component of membrane [GO:0016021]...
                        endoplasmic reticulum membrane [GO:0005789]; glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex [GO:0000506]; integral component of membrane [GO:0016021]
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