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
Other articles related to "human, humans":
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Famous quotes containing the word human:
“In Ireland they try to make a cat cleanly by rubbing its nose in its own filth. Mr. Joyce has tried the same treatment on the human subject. I hope it may prove successful.”
—George Bernard Shaw (1856–1950)
“A talent for drama is not a talent for writing, but is an ability to articulate human relationships.”
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—Eric Hoffer (1902–1983)