Pathology Immunity 8fb5b913 MHC III codes for A TNF alpha B IL 1 C HLA A D HLAB High-Yield Explanation Ans. (a) TNF alpha(Ref: Robbins 9th/pg 195; 8th/pg 191)MHC III: No direct role in immune system QCodes for:complement components C2, C4, properdin, factor B QTNF, HSP-70, Tyrosine hydroxylase