if the cell line lymphocytes are cultured with the antigen dnp-ficoll without the presence of t cell factors or filler cells they do not produce an immune response above background , but the addition of supernatant from el4 lymphoma and irradiated normal spleen filler cells results in a 7- to 10-fold increase in plaque-forming cells .
C0024264
lymphocytes
C0024299
lymphoma