Ethanolamine phosphate transferase involved in glycosylphosphatidylinositol-anchor biosynthesis. Transfers ethanolamine phosphate to the GPI second mannose. Although not essential, addition of ethanolamine phosphate to the second mannose plays an important role in cell separation via the GPI-based modification of daughter-specific proteins. Glycolipid biosynthesis; glycosylphosphatidylinositol-anchor biosynthesis. N-glycosylated. Present with 259 molecules/cell in log phase SD medium. Belongs to the PIGG/PIGN/PIGO family. PIGG subfamily.