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xanthine dehydrogenase
Xanthine dehydrogenase, also known as XDH, is a protein that, in humans, is encoded by the ''XDH'' gene.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=7498 )〕
==Function==
Xanthine dehydrogenase belongs to the group of molybdenum-containing hydroxylases involved in the oxidative metabolism of purines. The enzyme is a homodimer. Xanthine dehydrogenase can be converted to xanthine oxidase by reversible sulfhydryl oxidation or by irreversible proteolytic modification.〔
Xanthine dehydrogenase catalyzes the following chemical reaction:
xanthine + NAD+ + H2O urate + NADH + H+
The three substrates of this enzyme are xanthine, NAD+, and H2O, whereas its three products are urate, NADH, and H+.
This enzyme participates in purine metabolism.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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