Epicatechin gallate and EGCG have regulatory effects on benzo[a]pyrene (B[a]P)‐induced lung cancer in mice through differential regulation of p53 and expression of its associated genes, including p21 and 27, Bcl‐2, bax, mdm2, C‐Myc, H‐ras, and cyclin D1 (Manna et al. 2009). The gene discussed is CDKN1A; the disease is lung cancer.