accessory receptor
1.ICAM-1 is an accessory molecule stabilizing the T-cell receptor-mediated binding between antigen-presentingcells and T lymphocytes, and serves as a cofactor in the activation of the cellular immune response.
2.An optimal T cell response is achieved by a combination of signals delivered through the antigen-specific T cell receptor (TCR) engagement of the peptide-major histocompatibility complex (MHC) on antigen presenting cells(APCs) and accessory signals provided by the interaction of receptors on T cells with their ligands on APCs and is referred to as costimulation.
