The ABCD (for AntiBodies Chemically Defined) database is a repository of sequenced antibodies, integrating curated information about the antibody and its antigen with cross-links to standardized databases of chemical and protein entities. It is freely available to the academic community, accessible through the ExPASy server (https://web.expasy.org/abcd/). The ABCD database aims at helping to improve reproducibility in academic research by providing a unique, unambiguous identifier associated to each antibody sequence. It also allows to determine rapidly if a sequenced antibody is available for a given antigen.
Lima, W. C., Gasteiger, E., Marcatili, P., Duek, P., Bairoch, A., & Cosson, P. (2020). The ABCD database: a repository for chemically defined antibodies. Nucleic acids research, 48(D1), D261–D264. https://doi.org/10.1093/nar/gkz714