four human t cell lines , mt-2 , tcl-kan , tcl-as 2 , and tcl-haz , established from normal leukocytes by cocultivation with adult t-cell leukemia ( atl ) virus ( atlv ) -producing cells , produced constitutively phagocytosis inducing factor ( s ) ( pif ) that induced phagocytosis in a human monocytic cell line , thp-1 .
C0007634
cells
C0031308
phagocytosis