Copper is a constituent of the enzyme
Role in Enzyme Action: Cu forms integral pa of ceain enzymes, e.g. some of cytochromes, cytochrome oxidase, tyrosinase, Monoamine oxidase (MAO), Lysyl oxidase, Catalase, Ascorbic acid oxidase, uricase and superoxide dismutase. These enzymes contain about 550 mg of Cu per gram of enzyme proteinRef: MN Chatterjea Textbook of Medical Biochemistry, 6th edition, page no: 622
Lysyl oxidase
Glucose oxidase
Xanthine oxidase
Transketolase
Respiratory chain