All of the following enzymes and their reactions are involved in the metabolism of Xenobiotics, EXCEPT:
Cytochrome oxidase is not mentioned as an enzyme in the metabolism of xenobiotics but Cytochrome P450 and Hydroxylation reactions are involved in Phase-1 metabolic reactions and Methylation forms a pa of phase II reactions. Ref: Harpers Biochemistry, 27th Edition, Page 633; Lippincott's Illustrated Reviews: Pharmacology, 4th Edition, Page 14; Goodman and Gilman's The Pharmacological Basis of Therapeutics, 11th Edition, Page 44
Cytochrome oxidase
Cytochrome p 450
Methylation
Hydroxylation