Provided below are ELISA kits targeting phosphatidylinositol glycan anchor biosynthesis class W, a human protein encoded by PIGW. This protein is 504 amino acids long, with a mass of 56.9 kDa, and is a member of the PIGW family. It is also an enzyme classified as a(n) transferase (broad). There is a noted implication in Glycosylphosphatidylinositol biosynthesis defect 11. Other alias names for this protein include: phosphatidylinositol-glycan biosynthesis class W protein, Gwt1, and HPMRS5.