second , interleukin 2 ( il-2 , 125 u/ml ) was added to the culture of bcl1 cells to detect a small amount of trf-active materials since il-2 synergizes with a suboptimal dose of trf to induce igm secretion in trf-responding bcl1 cells ( chronic b cell leukemic cells ) .
C1327616
secretion
C0007634
cells