Source:http://linkedlifedata.com/resource/umls/id/C1515879
NCI: An immune cell such as a T or B lymphocyte that responds to a single, specific antigen.,NCI: A white blood cell that, after being in contact with an antigen, rearranges its DNA to defend against that one specific type of antigen. After activation, it can then proliferate and differentiate into memory cells, antibody-secreting cells or plasma cells.