The following signs are characteristic of the antigens of the main complex of the histocompatibility system:

a) MHC antigens are unique for each organism and determine its biological individuality;

b) according to the chemical structure and functional purpose, the MNF is divided into two classes;

d) MHC class I antigens are located on the surface of all nucleated cells;

f) MHC class II antigens are located on the membrane of immunocompetent cells.