Ready-to-use ELISA kits are available for the detection of GPB.NY, an alias of the protein, glycophorin B (MNS blood group). The official gene symbol is GYPB. The protein, with a mass of 9.8 kDa and length of 91 residues, is reported to be membrane-associated. It is a member of the Glycophorin-A family and may be known by other names, including: blood group system MNSs Mur-like, Ss blood group, GYPB/GYPA fusion, GYPB-A-B fusion, GYPB-A fusion, and glycophorin-B, and blood group system MNSs St(a) type F.