The activity of IL-1 was expressed as its ability to stimulate 3H-TdR incorporation in the thymocytes of C57 mice .
the activity of il-1 was expressed as its ability to stimulate 3h-tdr incorporation in the thymocytes of c57 mice .
O O O B-protein_molecule O O O O O O O B-protein_molecule O O O B-cell_type O O O O