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・ Diameter Credit-Control Application
・ Diameter of a finite group
・ Diameter protocol
・ Diameter tape
・ Diamictite
・ Diamicton
・ Diamine
・ Diamine N-acetyltransferase
・ Diamine transaminase
・ Diamino acid
・ Diaminobutyrate acetyltransferase
・ Diaminobutyrate decarboxylase
・ Diaminobutyrate—2-oxoglutarate transaminase
・ Diaminobutyrate—pyruvate transaminase
・ Diaminohexanoic acid
Diaminohydroxyphosphoribosylaminopyrimidine deaminase
・ Diaminopimelate decarboxylase
・ Diaminopimelate dehydrogenase
・ Diaminopimelate epimerase
・ Diaminopimelic acid
・ Diaminopropane
・ Diaminopropionate ammonia-lyase
・ Diaminopyrimidine
・ Diamir
・ Diamitosa moseri
・ Diammonium phosphate
・ Diamnati
・ Diamniadio Arrondissement
・ Diamon
・ Diamon Simpson


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Diaminohydroxyphosphoribosylaminopyrimidine deaminase : ウィキペディア英語版
Diaminohydroxyphosphoribosylaminopyrimidine deaminase

In enzymology, a diaminohydroxyphosphoribosylaminopyrimidine deaminase () is an enzyme that catalyzes the chemical reaction
:2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine + H2O \rightleftharpoons 5-amino-6-(5-phosphoribosylamino)uracil + NH3
Thus, the two substrates of this enzyme are 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine and H2O, whereas its two products are 5-amino-6-(5-phosphoribosylamino)uracil and NH3.
This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds (specifically in cyclic amidines). The systematic name of this enzyme class is 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine 2-aminohydrolase. This enzyme participates in riboflavin metabolism.
==Structural studies==

As of late 2007, 6 structures have been solved for this class of enzymes, with PDB accession codes , , , , , and .

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