Zinc is a cofactor of
Metalloenzymes: These enzymes hold the metals rather tightly which are not readily exchanged. 
Alcohol dehydrogenase, carbonic anhydrase, alkaline phosphatase, carboxypeptidase and aldolase contain zinc.
Phenol oxidase (copper); Pyruvate oxidase (manganese); Xanthine oxidase (molybdenum); Cytochrome oxidase (iron and copper).
Satyanrayana, Ed 3, page no 91
Alcohol dehydrogenase
Pyruvate Carboxylase
Pyruvate oxidase
None of the above