The function of CYP2A7 (cytochrome P450 family 2 subfamily A member 7, ENSG00000198077) is as follows. Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics.