Abstract
The 1st phosphorylated product resulting from D-xylose utilization by cell-free extracts of Pseudomonas hydrophila is D-xylose phosphate. This and other phosphorylated compounds derived from it were identified by chromatography using specific color sprays, by spectrophotometric analysis, and by formation of several pure, crystalline derivatives of the free sugars after dephosphorylation with acid phosphatase. Present data support the following initial pathway of D-xylose utilization (anaerobic): D-xyloseD-xylulose[forward arrow] D-xylulose phosphate D-ribulose phosphateD-ribose phosphatesedoheptulose phosphate.

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