T4 cells recognizes antigen in association with all of the following EXCEPT: September 2004: (A) Major histocompatibility factor/ MHA-I, (B) MHA-II, (C) HLA-DR, (D) HLA-DZ
Answer is A. Ans. A i.e. Major Histocompatility factor/ MHA-I HLA complex of genes are: HLA-A, B, C (Class I) HLA-D, DR, DQ and DP (class II) CD8 (previously known as T8) molecule is present on suppressor and cytotoxic cells. They recognize antigen by MHC class-I molecule.