[3][4] Only the epidermal cells of plants synthesize cutin.
[5] Omega hydroxy fatty acids also occur in animals.
Cytochrome P450 (CYP450) microsome ω-hydroxylases such as CYP4A11, CYP4A22, CYP4F2, and CYP4F3 in humans, Cyp4a10 and Cyp4a12 in mice, and Cyp4a1, Cyp4a2, Cyp4a3, and Cyp4a8 in rats metabolize arachidonic acid and many arachidonic acid metabolites to their corresponding omega hydroxyl products.
[8][9][10] The definition for "omega" includes number of carbons (C#) greater or equal to three.
Lower numbers are included here to match the formula pattern CnH2nO3.