Anti-MCD4 antibodies enable researchers to detect and measure the MCD4 antigen in biological samples. This target is a reported synonym of the PIGN gene, which encodes phosphatidylinositol glycan anchor biosynthesis class N. The human version of MCD4 has a canonical amino acid length of 931 residues and a protein mass of 105.8 kilodaltons. It is reported to be localized in the ER of cells and widely expressed in many tissue types. Other names for this target antigen include MCAHS and MCAHS1.