the frequencies of precursors of c57bl/6 t lymphocytes that respond to dba/2 alloantigens by secreting the lymphokines interleukin 2 ( il-2 ) , macrophage-activating factor ( maf ) , and granulocyte-macrophage colony-stimulating factor ( gm-csf ) have been directly compared with cytolytic t lymphocyte precursor ( ctl-p ) frequencies in limiting dilution microcultures established from spleen cells positively or negatively selected on the basis of lyt-2 phenotype .
C1536403
cytolytic
C0007634
cells