| UDPglucuronic acid cyclase | <enzyme> Forms udpapiose plus carbon dioxide Registry number: EC 4.1.1.- Synonym: udpglucuronic carboxy-lyase (cleaving, cyclizing) (26 Jun 1999) |
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| UDPxylose | A pyrophosphate group links the 5' position of uridine and the 1-position of d-xylose; formed by the decarboxylation of UDPglucuronic acid; required for the synthesis of proteoglycans; inhibits UDPglucose dehydrogenase. (05 Mar 2000) |