Table 4.
Redox states of metals with metallo-enzymes and their specific catalytic functions
| Metal | Redox state | Enzymes | Class of catalysis by enzyme |
|---|---|---|---|
| Copper | Cu (II), Cu (I) | Most copper-containing enzymes (e.g. Cytochromes) | Electron transfer, ferrous oxidase, amine oxidase |
| Iron |
Fe (II), Fe (III), Fe (IV), Fe (V) |
Cytochromes Peroxidase, catalase |
Electron transfer, Oxidation |
| Molybdenum | Mo (III) to Mo (VI) | Nitrogenase, Aldehyde oxidase | Oxidation |
| Cobalt | Co (I)?, Co (II), Co (III) | B12- requiring enzymes | Carbonic anhydrase |
| Manganese | Mn (III) to Mn (IV)? | Photosynthetic enzymes | Superoxide dismutase, oxidase |
| Chromium | Cr (VI) to Cr (III) | Dehydrogenase | Oxidoreductases |