To evaluate the inhibitory effect on cell viability of SK-Mel-2 human melanoma cells, Kim et al. (2012) incubated these cells with G-Rk1 for 24 and 48 h at different concentrations (0, 10, 25, 50, 75, 100 μM) in a dose-dependent manner. The gene discussed is GRK1; the disease is melanoma.