Complex of at least five membrane-bound polypeptides in mature T-lymphocytes that are non-covalently associated with one another and with the T-cell receptor (RECEPTORS, ANTIGEN, T-CELL). The CD3 complex includes the gamma, delta, epsilon, zeta, and eta chains (subunits). When antigen binds to the T-cell receptor, the CD3 complex transduces the activating signals to the cytoplasm of the T-cell. The CD3 gamma and delta chains (subunits) are separate from and not related to the gamma/delta chains of the T-cell receptor (RECEPTORS, ANTIGEN, T-CELL, GAMMA-DELTA).

Descriptor ID	D017252
MeSH Number(s)	D23.050.301.264.894.095 D23.101.100.894.095
Concept/Terms	CD3 Complex CD3 Complex T3 Antigens Antigens, T3 T3 Complex CD3 Antigens Antigens, CD3 T3 Antigen Antigen, T3 CD3 Antigen Antigen, CD3

Below are MeSH descriptors whose meaning is more general than "CD3 Complex".

Below are MeSH descriptors whose meaning is related to "CD3 Complex".

Below are MeSH descriptors whose meaning is more specific than "CD3 Complex".