HLA-A,B,C mAb (W6/32), InVivoPure

The HLA-A,B,C mAb (W6/32) monoclonal antibody reacts with the human major histocompatibility complex (MHC) class I, HLA-A, B, C. MHC class I antigens associated with beta 2-microglobulin are expressed by all human nucleated cells and are central in cell-mediated immune response and tumor surveillance. W6/32 mAb recognizes a non-polymorphic epitope shared among products of the HLA-A, B, and C loci and immunoprecipitates both 43 kDa and 11-12 kDa chains. Crossreactivity is also seen in baboon, rhesus and cynomolgus monkey. MHC class I plays a crucial role in the adaptive immune response by presenting endogenous antigens to cytotoxic CD8 T cells. The T cell receptor (TCR)/CD3 complex of CD8 T cells interacts with peptide MHC class I, which induces CD8 T cell activation and subsequent cell killing. CD8 molecules also bind to MHC class I, which enhances TCR signaling. In contrast to CD8 T cells, MHC class I is an inhibitory ligand for natural killer cells (NK cells) and promotes self-tolerance.