GYPA encodes glycophorin A, the most abundant sialoglycoprotein on erythrocyte surfaces 1. Its primary function involves serving as a receptor for pathogens; notably, it binds the erythrocyte-binding antigen 175 (EBA-175) of Plasmodium falciparum through sialic acid residues on O-linked glycans, facilitating parasite invasion 2. GYPA also binds various non-pathogenic viruses and bacteria, suggesting a potential decoy receptor function that diverts pathogens from nucleated cells 1. Mechanistically, GYPA is heavily glycosylated on its external surface, contributing to the red blood cell's negatively charged glycan "coat" 3. Exon 2 of GYPA encodes the primary P. falciparum binding ligand 2. The gene exists as part of a duplicated genomic segment that generated glycophorins B and E approximately 10-15 million years ago 3. Clinically, GYPA variation significantly impacts malaria susceptibility. Structural mutations in the glycophorin gene region, particularly the Dantu blood group antigen, show strong protection against severe malaria (OR 0.57 for heterozygotes, p=3.22×10⁻¹¹) 4. Evidence of balancing selection on GYPA exon 2 in malaria-endemic populations indicates adaptive evolution driven by parasite pressure 5, 2. These findings underscore GYPA's critical role in malaria pathogenesis and represent a major selective force in recent human evolution.