Human
Three forms of superoxide dismutase are present in humans, in all other mammals, and most chordates. SOD1 is located in the cytoplasm, SOD2 in the mitochondria, and SOD3 is extracellular. The first is a dimer (consists of two units), whereas the others are tetramers (four subunits). SOD1 and SOD3 contain copper and zinc, whereas SOD2, the mitochondrial enzyme, has manganese in its reactive centre. The genes are located on chromosomes 21, 6, and 4, respectively (21q22.1, 6q25.3 and 4p15.3-p15.1).
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Read more about this topic: Superoxide Dismutase, Types
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Famous quotes containing the word human:
“Poor America, of what avail is all her wealth, if the individuals comprising the nation are wretchedly poor? If they live in squalor, in filth, in crime, with hope and joy gone, a homeless, soilless army of human prey.”
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