Source:http://linkedlifedata.com/resource/umls/id/C0010357
MSH: Serological reactions in which an antiserum against one antigen reacts with a non-identical but closely related antigen.,NCI: A molecular interaction between a ligand molecule and a receptor molecule, where the ligand and receptor are not conventional partners. This interaction can occur because the ligand molecule shares structural features with the archetypal ligand.