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SOD genes. A comparison of the different SOD genes and the enzymes that they encode, showing the catalytic domains that bind Cu/Zn in SOD1 and SOD3 and Mn in SOD2. Homology is shown between intracellular SOD1 and extracellular SOD3. There is no significant amino acid homology between SOD2 and SOD1 and SOD3. Figure adapted from Sah et al.11
