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[Product of second-stage riboflavin biosynthesis in Pichia guilliermondii].

Authors
Type
Published Article
Journal
Mikrobiologiia
Publication Date
Volume
48
Issue
4
Pages
756–758
Identifiers
PMID: 481291
Source
Medline

Abstract

Dialyzed extracts of the mutants of Pichia guilliermondii RG80 (rib3, his-) and RA39 (rib3, ade-) in which the third step of flavinogenesis was genetically blocked converted GTP into 2,5-diamino-6-hydroxy-4-ribitylaminopyrimidine phosphate and 2,5-diamino-6-hydroxy-4-ribitylaminopyrimidine in the presence of NADPH2. Apparently, 2,5-diamino-6-hydroxy-4-ribitylaminopyrimidine phosphate is a true precursor of riboflavin whereas 2,5-diamino-6-hydroxy-4-ribitylaminopyrimidine is formed upon its hydrolysis.

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