The T-cell antigen receptor (TCR) consists of an antigen-binding heterodimer, termed Ti, which is noncovalently associated with the invariant CD3 subunits (gamma, delta, epsilon, zeta, and eta). The C
The CD3 eta subunit of the T-cell antigen receptor forms a heterodimeric structure with the CD3 zeta subunit in thymus-derived lymphoid cells and is apparently involved in signal transduction through
