<prompt> MHC class III genes encodeComplement component C3Interleukin 2Tumor necrosis factorBeta 2 microglobulin  <response>: HLA class III contains genes for Complement components C2 and C4 of classical pathway Not C3 Properdin factor B of alternate pathway Tumor necrosis factor: Alpha and Beta Heat shock protein 70 Enzyme tyrosine hydroxylase Genes for MHC also known as HLA are located on short arm of chromosome 6. 