A cytochrome P450 monooxygenase involved in the metabolism of fatty acids. Catalyzes predominantly the oxidation of the terminal carbon (omega-oxidation) of long-chain fatty acids (PubMed:10620324, PubMed:3027069, PubMed:10362749). Acts as a major omega-hydroxylase for dodecanoic (lauric) acid in liver (PubMed:3027069). In kidney, may play an important role in omega-hydroxylation of (5Z,8Z,11Z,14Z)-eicosatetraenoic acid (arachidonate) to 20-hydroxyeicosatetraenoic acid (20-HETE), a signaling molecule acting both as vasoconstrictive and natriuretic with overall effect on arterial blood pressure (PubMed:10362749, PubMed:10620324, PubMed:16212878). Also participates in the formation of anti-inflammatory hydroxyepoxyeicosatrienoic acids (HEETs) in kidney by converting 8,9-epoxyeicosatrienoic acid (EET) to 20,8,9-HEET, an activator of PPARA (PubMed:14742258). Displays substantially lower fatty acid omega-1 hydroxylase activity (PubMed:10362749, PubMed:10620324). Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase) (PubMed:10620324, PubMed:3027069, PubMed:10362749). an omega-methyl-long-chain fatty acid + O2 + reduced [NADPH--hemoprotein reductase] = an omega-hydroxy-long-chain fatty acid + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] dodecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 12-hydroxydodecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] dodecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 11-hydroxydodecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] O2 + reduced [NADPH--hemoprotein reductase] + tetradecanoate = 14-hydroxytetradecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] hexadecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 16-hydroxyhexadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-octadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = 18-hydroxy-(9Z)-octadecenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z,12Z)-octadecadienoate + O2 + reduced [NADPH--hemoprotein reductase] = 18-hydroxy-(9Z,12Z)-octadecadienoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z,12Z)-octadecadienoate + O2 + reduced [NADPH--hemoprotein reductase] = 17-hydroxy-(9Z,12Z)-octadecadienoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (5Z,8Z,11Z,14Z)-eicosatetraenoate + O2 + reduced [NADPH--hemoprotein reductase] = 20-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] 8,9-epoxy-(5Z,11Z,14Z)-eicosatrienoate + O2 + reduced [NADPH--hemoprotein reductase] = 20-hydroxy-8,9-epoxy-(5Z,11Z,14Z)-eicosatrienoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] kcat is 649 min-1 for dodecanoate. kcat is 230 min-1 for tetradecanoate. kcat is 60 min-1 for hexadecanoate. kcat is 1.4 min-1 for (9Z)-octadecenoate. kcat is 6 min-1 for (5Z,8Z,11Z,14Z)-eicosatetraenoate. Expressed in liver (at protein level) and kidney (at protein level). By clofibrate. Belongs to the cytochrome P450 family.