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・ Pyridylnicotinamide
・ Pyridyne
・ Pyrilampes
・ Pyrilia
・ Pyrimethamine
・ Pyrimethanil
・ Pyrimidine
・ Pyrimidine analogue
・ Pyrimidine dimer
・ Pyrimidine metabolism
・ Pyrimidine oxygenase
・ Pyrimidine phosphorylase
・ Pyrimidine-5'-nucleotide nucleosidase
・ Pyrimidine-deoxynucleoside 1'-dioxygenase
・ Pyrimidine-deoxynucleoside 2'-dioxygenase
Pyrimidine-nucleoside phosphorylase
・ Pyrimidinedione
・ Pyrimidinylpiperazine
・ Pyrimidodiazepine synthase
・ Pyrimidone
・ Pyrin domain
・ Pyrinia
・ Pyrinia incensata
・ Pyrinioides
・ Pyrinioides sinuosus
・ Pyrinuron
・ Pyriphis
・ Pyripnoa
・ Pyriprole
・ Pyriproxyfen


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Pyrimidine-nucleoside phosphorylase : ウィキペディア英語版
Pyrimidine-nucleoside phosphorylase

In enzymology, a pyrimidine-nucleoside phosphorylase () is an enzyme that catalyzes the chemical reaction
:a pyrimidine nucleoside + phosphate \rightleftharpoons a pyrimidine base + alpha-D-ribose 1-phosphate
Thus, the two substrates of this enzyme are pyrimidine nucleoside and phosphate, whereas its two products are pyrimidine base and alpha-D-ribose 1-phosphate.
This enzyme belongs to the family of glycosyltransferases, specifically the pentosyltransferases. The systematic name of this enzyme class is pyrimidine-nucleoside:phosphate alpha-D-ribosyltransferase. This enzyme is also called Py-NPase. This enzyme participates in pyrimidine metabolism.
==Structural studies==

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

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