a,protein meaning in English

《英文msh词典》A,Protein
[入口词] A,Protein
[主题词] Staphylococcal Protein A
[英文释义] A protein present in the cell wall of most Staphylococcus aureus strains. The protein selectively binds to the Fc region of human normal and myeloma-derived IMMUNOGLOBULIN G. It elicits antibody activity and may cause hypersensitivity reactions due to histamine release; has also been used as cell surface antigen marker and in the clinical assessment of B lymphocyte function.