Panel 3A, Cell proliferation after 24, 48, or 72 hr incubation in the presence of the indicated concentrations of 17-DMAG (n=3). Panel 3B, Cdk6 levels after 24 hr of treatment with the indicated concentrations of 17-DMAG. Panel 3C, Densitometry of Cdk6 levels remaining after 24 hr of treatment with the indicated concentrations of 17-DMAG (n=3). Panel 3D, PARP cleavage after 24 treatment with the indicated concentrations of 17-DMAG.