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. Author manuscript; available in PMC: 2022 Jan 5.
Published in final edited form as: Semin Cancer Biol. 2021 Jul 7;76:3–16. doi: 10.1016/j.semcancer.2021.07.001

Figure 7.

Figure 7.

Role of CYP1A2 in the sustained CYP1A1 induction. We propose that CYP1A2 may do this by metabolizing MC to MC-X, which binds to the AHR complex. After dissociation, the MC-X-AHR complex binds to ARNT at the XRE binding site and forms a MC-X DNA adduct. We posit that the MC-X binds covalently to DNA, and prevents binding of DNMT and HDAC that keep the promoter in silenced state, leading to sustained CYP1A1 induction.