in 293 cells 12-o-tetradecanoylphorbol-13-acetate ( tpa ) , phorbol 12,13-dibutyrate and phorbol 12,13-didecanoate caused a 2- to 3-fold increase in cytoplasmic levels of e1 rna within 90 min , whereas the nonpromoting tpa analogues 4-alpha-phorbol 12,13-didecanoate and phorbol , or the addition of serum to serum-starved cells , had no effect on e1 rna .
C0010834
cytoplasmic
C0007634
cells