Journal of Biological Chemistry
Volume 275, Issue 15, 14 April 2000, Pages 11300-11305
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METABOLISM AND BIOENERGETICS
Biosynthesis of Vitamin B6 inRhizobium *

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The biosynthetic pathway of pyridoxol (vitamin B6) in Rhizobium was clarified by studies on the incorporation of 13C- or 15N-labeled precursors into pyridoxol or its biosynthetic intermediates. Pyridoxol was formed by ring closure of two compounds, 1-deoxy-d-xylulose and 4-hydroxy-l-threonine. The former was formed from d-glyceraldehyde and pyruvate through decarboxylation of pyruvate, and the latter from glycine and glycolaldehyde.

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