GPI ethanolamine phosphate transferase 1, 2---, MCD4 homolog, Phosphatidylinositol-glycan biosynthesis class N protein, PIG-N, PIGN, MCD4
PIGN is involved in glycosylphosphatidylinositol (GPI)-anchor biosynthesis. The GPI-anchor is a glycolipid found on many blood cells and serves to anchor proteins to the cell surface. This protein is expressed in the endoplasmic reticulum and transfers phosphoethanolamine (EtNP) to the first mannose of the GPI anchor.