MHC (Major Histocompatibility Complex)

The Major Histocompatibility Complex (MHC) is a group of genes in our bodies that help the immune system recognize which cells belong to us and which are foreign. MHC proteins are found on the surface of cells and display small fragments of proteins from inside the cell. If these fragments show signs of infection or abnormality, immune cells can detect and respond to potential threats. Essentially, MHC acts like a quality control system, allowing the immune system to distinguish between healthy cells and invaders like viruses, helping protect the body from illness.