 This gene is a transcription factor that regulates the cell cycle and hence functions as a tumor suppressor.By inducing G (guanine) to T (thymidine) transversions in transversion hotspots within p53, there is a probability that benzo["a"]pyrene diol epoxide inactivates the tumor suppression ability in certain cells, leading to cancer.Benzo["a"]pyrene-7,8-dihydrodiol-9,10-epoxide is the carcinogenic product of three enzymatic reactions