the stimulation reaches its maximum within 2 min , is reduced at acidic intracellular ph values ( half-maximal at phi = 6.8 ) , and can also be induced , to a lesser extent , by egf and the phorbol ester 12-o-tetradecanoylphorbol 13-acetate , the effects of which are nearly additive .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol 13-acetate