<prompt> Co-factor for phosphofructokinase is -Mg2Mn2Fe2Zn  <response>: Ans. is a i.e., Mg2 MetalMetalloenzymesCa2Lipase, LecithinaseCopper Cu2CuCytochrome oxidaseQ, Tyrosinase. Lysyl oxidaseQ, Superoxide dismutase.Ascorbic acid oxidase, Ferroxidase ceruloplasmin.Iron Fe2Fe3Cytochrome oxidase. Xanthine oxidase, Catalase, PeroxidaseZinc Zn2Carbonic anhvdrase, alkaline phosphataseQ, RNA polymerase, alcohol dehydrogenaseQ, Carboxypeptidase, Prophobilinogen synthase, glutamate dehydrogenase, lactate dehydrogenaseQ. Superoxide dismutaseQ.Magnesium Mg2Hexokinase. phosphofructokinase, giueose-6-phoshphatase, enolase, creatinine kinase,PhosphatasesQ, KinaseQ.Maganese Mn2Arginase, Pyruvate carboxylase, phosphoglucomutase, Glycosyl transferase,Hexokinase, Enolase.Potasium K2Pyruvate kinaseSeleniumGlutathione peroxidaseQNickle Ni2UreaseMolybdenumXanthine oxidaseNote : - Some metalloenzymes contain more than one metal e.g., cytochrome oxidase contains both iron and copper. 