class III antigens

class III an·ti·gens

non-cell-membrane molecules that are encoded by the S region of the major histocompatibility complex. These antigens are not involved in determining histocompatibility and include the complement proteins as well as certain cytokine genes that is, tumor necrosis factors α and β.

class III an·ti·gens

(klas an'ti-jenz)
Non-cell-membrane molecules that are encoded by the S region of the major histocompatibility complex. These antigens are not involved in determining histocompatibility and include the complement proteins.
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