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| {{enzyme
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| | Name = (S,S)-butanediol dehydrogenase
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| | EC_number = 1.1.1.76
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| | CAS_number = 37250-14-9
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| | IUBMB_EC_number = 1/1/1/76
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| | GO_code = 0047512
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| In [[enzymology]], a '''(S,S)-butanediol dehydrogenase''' ({{EC number|1.1.1.76}}) is an [[enzyme]] that [[catalysis|catalyzes]] the [[chemical reaction]]
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| :(S,S)-butane-2,3-diol + NAD<sup>+</sup> <math>\rightleftharpoons</math> acetoin + NADH + H<sup>+</sup>
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| Thus, the two [[substrate (biochemistry)|substrates]] of this enzyme are [[2,3-Butanediol|(S,S)-butane-2,3-diol]] and [[nicotinamide adenine dinucleotide|NAD<sup>+</sup>]], whereas its 3 [[product (chemistry)|products]] are [[acetoin]], [[nicotinamide adenine dinucleotide|NADH]], and [[hydrogen ion|H<sup>+</sup>]].
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| This enzyme belongs to the family of [[oxidoreductase]]s, specifically those acting on the CH-OH group of donor with NAD<sup>+</sup> or NADP<sup>+</sup> as acceptor. The systematic name of this enzyme class is '''(S,S)-butane-2,3-diol:NAD<sup>+</sup> oxidoreductase'''. Other names in common use include '''L-butanediol dehydrogenase''', '''L-BDH''', and '''L(<sup>+</sup>)-2,3-butanediol dehydrogenase (L-acetoin forming)'''. This enzyme participates in [[butanoic acid]] metabolism.
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| ==References==
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| {{reflist|1}}
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| * {{cite journal | author = Taylor MB and Juni E | date = 1960 | title = Stereoisomeric specificities of 2,3-butanediol dehydrogenase | journal = Biochim. Biophys. Acta | volume = 39 | pages = 448–457 | doi = 10.1016/0006-3002(60)90197-9 | pmid=13837186 | issue = 3}}
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| [[Category:EC 1.1.1]]
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| [[Category:NADH-dependent enzymes]]
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| [[Category:Enzymes of unknown structure]]
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| {{1.1.1-enzyme-stub}}
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