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Manganese is a chemical element in the periodic table that has the symbol Mn and atomic number 25.
Biological role Manganese is an essential trace nutrient in all forms of life.
The classes of enzymes that have manganese cofactors are very broad and include such classes as oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases, lectins, and integrins. The best known manganese-containing polypeptides may be arginase, Mn-containing superoxide dismutase, and the diphtheria toxin.
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