To investigate the genotoxic effect of androgens on LNCaP human prostate cancer cells, which express functional AR (Horoszewicz et al., 1983), we enriched G1‐phase cells more than 90% by serum starvation for 48 hr (Figure S1a) and analyzed only cyclin‐A‐negative, G1‐phase cells. The gene discussed is CCNA2; the disease is prostate cancer.