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・ Chalcolepidius zonatus
・ Chalcolestes
・ Chalcolestes parvidens
・ Chalcolestes viridis
・ Chalcolithic
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・ Chalcolithic Temple of Ein Gedi
・ Chalcolyne metallica
・ Chalcombe Road Halt railway station
・ Chalcomima
・ Chalcomitra
・ Chalcon
・ Chalcone
・ Chalcone (skipper)
・ Chalcone 4'-O-glucosyltransferase
Chalcone isomerase
・ Chalcone synthase
・ Chalconoid
・ Chalconotus
・ Chalconyx
・ Chalcopasta
・ Chalcophaps
・ Chalcophlocteis
・ Chalcophora
・ Chalcophora japonica
・ Chalcophora virginiensis
・ Chalcophorella
・ Chalcophoropsis
・ Chalcophorotaenia
・ Chalcophyllite


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Chalcone isomerase : ウィキペディア英語版
Chalcone isomerase

In enzymology, a chalcone isomerase () is an enzyme that catalyzes the chemical reaction
:a chalcone \rightleftharpoons a flavanone
Hence, this enzyme has one substrate, a chalcone, and one product, a flavanone.
This enzyme belongs to the family of isomerases, specifically the class of intramolecular lyases. The systematic name of this enzyme class is flavanone lyase (decyclizing). This enzyme is also called chalcone-flavanone isomerase. This enzyme participates in flavonoid biosynthesis.
The ''Petunia hybrida'' (Petunia) genome contains two genes coding for very similar enzymes, ChiA and ChiB, but only the first seems to encode a functional chalcone isomerase.
==Structural studies==

As of late 2007, 7 structures have been solved for this class of enzymes, with PDB accession codes , , , , , , and .
Chalcone isomerase has a core 2-layer alpha/beta structure consisting of beta(3)-alpha(2)-beta-alpha(2)-beta(3).

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