the lymphokine supernatants , when added to macrophage cultures ( the equivalent of 60 x 10 ( 6 ) lymphocytes added to 40 x 10 ( 6 ) macrophages ) , activated the macrophages so that they secreted the enzyme collagenase after 48 h and 72 h of culture .
C0024297
lymphokine
C0024264
lymphocytes