| Modification Notes |
Cytochrome P450 proteins are heme-thiolate monooxygenases that mediate NADPH-dependent electron transport and function to oxidize a variety of structurally unrelated compounds, including steroids, fatty acids and xenobiotics. Specifically, Cytochrome P450s are responsible for metabolizing arachidonic acid to hydroxyeicosatetraenoic acid (a regulator of blood pressure) and epoxyeicosatrienoic acid (a molecule involved in signaling events). CYP4B1 (cytochrome P450, family 4, subfamily B, polypeptide 1), also known as CYPIVB1 or P-450HP, is a 511 amino acid peripheral membrane protein of the endoplasmic reticulum and microsome that belongs to the cytochrome P450 family. Expressed in lung and liver, CYP4B1 is involved in NADPH-dependent electron transport pathway and oxidizes xenobiotics, fatty acids and steroids. CYP4B1 is encoded by a gene that maps to human chromosome 1p33 and exists as two alternatively spliced isoforms. |