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Gene structure of the human major histocompatibility complex

Gene structure of the human major histocompatibility complex
Chromosome 6 and its cytogenetic bands are shown. The human MHC region, also referred to as the HLA region (pink), is located on the short arm at position p21.3. The classical MHC spans 3.6 megabases (Mb) and includes more than 200 genes. Some MHC class I, II, and III genes are shown schematically.
HLA: human leukocyte antigen; TAP: transporter associated with antigen processing; TAPBP: TAP binding protein; LMP: low-molecular-weight protein (proteasome subunit); C4B: complement factor C4B; C4A: complement factor C4A; LTB: lymphotoxin beta; TNF: tumor necrosis factor-alpha; LTA: lymphotoxin alpha; MHC: major histocompatibility complex.
Modified from: Murphy KM, Travers P, Walport R. Antigen presentation to T lymphocytes. In: Janeway's Immunobiology, 7th ed, Murphey KM, Travers P, Walport M (Eds), Garland Science, 2007.
Graphic 109459 Version 2.0