CAP1-6D is an agonist peptide for cytotoxic T cell (CTL), that enhances the immunogenicity of the CAPI peptide, and stimulates T cell responses.
References:
[1]. Zaremba S, et al., Identification of an enhancer agonist cytotoxic T lymphocyte peptide from human carcinoembryonic antigen. Cancer Res. 1997 Oct 15;57(20):4570-7.