<prompt> Answer this question truthfullyWhich major histocompatibility complex MHC class is associated with the gene products of HLA-A, HLA-B, and HLA-C?  <response>: <reason> MHC I is the major histocompatibility complex class that is associated with the gene products of HLA-A, HLA-B, and HLA-C. These genes encode the alpha chains that make up the MHC I molecule. MHC I molecules are expressed on the surface of all nucleated cells and are responsible for presenting endogenous antigens, such as viral or tumor antigens, to CD8 T cells. The MHC I molecule consists of a heavy chain, which is a long chain, and a light chain, which is a short chain called beta-2 microglobulin. The heavy chain is composed of three domains, alpha 1, alpha 2, and alpha 3, which form a peptide-binding groove where the antigenic peptides can bind. The MHC I molecules present the processed antigenic peptides to CD8 T cells, which then activate an immune response against the antigen. 