the receptors for il 2 , which were initially absent from the cell surface , were induced on high percentages of the all cells after the in vitro exposure to the lectin phytohemagglutinin or the phorbol ester 12-o-tetradecanoylphorbol-13-acetate in six patients , suggesting that the cells had become sensitive to il 2 .
C0699040
cell surface
C0007634
cells