Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Major histocompatabilty complex (MHC)
Major histocompatabilty complex (MHC): A cluster of genes on
chromosome 6 concerned with antigen production and critical to transplantation. The MHC
includes the human leukocyte antigen (HLA) genes.