Cytochrome P450 2J2 (CYP2J2) is a protein that in humans is encoded by the CYP2J2 gene.[4][5] CYP2J2 is a member of the cytochrome P450 superfamily of enzymes. The enzymes are oxygenases which catalyze many reactions involved in the metabolism of drugs and other xenobiotics) as well as in the synthesis of cholesterol, steroids and other lipids.