on exposure to the phorbol ester 12-o-tetradecanoyl-13-acetate ( tpa ) the pathological ( non-dividing ) lymphocytes of b-cell chronic lymphocytic leukaemia ( cll ) lose their characteristic ultrasensitivity to the cytocidal action of colchicine in vitro .
C0024264
lymphocytes
C0023434
b-cell chronic lymphocytic leukaemia