phagocytosis by macrophages , the release of colony stimulating factor activity ( csf ) by macrophages , and chemotaxis by monocytes in response to human c5-derived chemotactic factor ( c5fr ) and formyl-methionyl-leucyl-phenylalanine ( f-mlp ) , were indistinguishable between labeled and unlabeled cells .
C0031308
phagocytosis
C0007634
cells