Description: | Protein A is a non-glycosylated cell wall protein of Staphylococcus aureus that can bind the Fc part of immunoglobulin molecule of different species with strong affinity (1-4). Protein A consists of five IgG binding domains (A, B, C, D, and E), each approximately 60 amino acids long with no cysteines present and two S. aureus cell membrane binding domains, X and M (3). |