Source:http://linkedlifedata.com/resource/umls/id/C0018593
MSH: Small antigenic determinants capable of eliciting an immune response only when coupled to a carrier. Haptens bind to antibodies but by themselves cannot elicit an antibody response.,CSP: substances which can act as an epitope for antibody but lack immunogenicity unless coupled to a larger carrier molecule.,NCI: A substance that can act as an epitope for an antibody but that lacks immunogenicity unless coupled to a larger carrier molecule.