This heterodimer targets downstream target genes, activating the corresponding genes' abnormal expression, such as cytochrome P450 1A1/ cytochrome P450 1B1 (CYP1A1/CYP1B1), ultimately leading to cell toxicity, interference with animal endocrine, immunotoxicity, and even occurrence of cancer [10]. The gene discussed is CYP1B1; the disease is cancer.