Fig. 7. Inhibition of [³H]thymidine incorporation by CAI and 2-APB in HEK-293 cells. HEK-293 cells were incubated for 24 hours in the presence of 10% FCS and for a further 24 hours in the presence of various concentrations of CAI (A) and 2-APB (B). Results are expressed as a percentage of [³H]thymidine incorporation in the absence of CAI and 2-APB in both conditions. The result for each experiment is the mean of four samples and each point on the plot is the mean±s.e.m. of three or four independent experiments.