while unstimulated purified leukemic b-cells showed no il-2lf production , in 16 of the 27 cases tested ( 59.2 % ) significant amounts of il-2lf ( 4.3-125 u ) were released following activation with phytohemagglutinin ( pha ) and the phorbol ester 12-o-tetradecanoylphorbol-13-acetate ( tpa ) .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol-13-acetate