NCIt synonyms : CD235b Antigen; Glycophorin B; SS-Active Sialoglycoprotein; GYPB; PAS-3; Sialoglycoprotein Delta; Glycophorin B Blood Group Antigen; CD235b;
NCIt definition : Glycophorin-B (91 aa, 10 kDa) is encoded by the human GYPB gene. This protein is
involved in the antigenic determination of the Ss blood group.;
NCIt note : Glycophorins A (GYPA) and B (GYPB) are sialoglycoproteins of the human erythrocyte
membrane and bear the antigenic determinants for the M/N and S/s blood groups. GYPA
and GYPB share 97% sequence homology with for the first 45 amino acids. In addition
to the M or N and S or s antigens, which are common in all populations, about 40 related
variant phenotypes have been identified. These variants include Dantu, Sat, He, Mg,
all the variants of the Miltenberger complex and several isoforms of Sta, and deletion
variants Ena, S-s-U- and Mk. Most variants result from recombinations between GYPA
and GYPB. (EntrezGene);