T cell activation requires a T cell receptor (TCR) to recognize its cognate peptide in the context of an MHC molecule. In addition, the association of CD3 with the TCR–peptide–MHC complex ...
ACROBiosystems CD3 molecules tend to bind to TCR non-covalently to develop a TCR/CD3 receptor complex on the T-cell’s surface. There are four subtypes of CD3 — CD3ε, CD3δ, CD3γ and CD3ζ.