human leukocyte antigen

Human Leukocyte Antigen (HLA) refers to a group of proteins found on the surface of most cells in your body. These proteins help your immune system recognize which cells belong to you and which are foreign, such as bacteria, viruses, or transplanted tissues. Think of HLAs as a unique cellular ID badge that facilitates immune response and tissue compatibility. Proper functioning of HLAs is vital for immune defense and successful organ transplants, as mismatches can lead to rejection or autoimmune issues. Their diversity among individuals is a key factor in immune system identification and compatibility.