cultures of elder human t cells produced low level of il2 activity , that is on the average of 9.7 +/- 9.8 mu/ml , equivalent to 28.1 % the il2 activity in parallel cultures of pbl derived from young donors ( 34.2 +/- 8.3 mu/ml , assessed on the basis of 145 samples ) .
C0086418
human
C0021756
il2