J Chromatogr B Biomed Appl 1995 Jul 21;6692:171-6. doi: 10.1016/0378-4347(95)00117-2.

High-performance liquid chromatographic system for separating sugar phosphates and other intermediary metabolites.

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A simple method for separating intermediates of carbohydrate metabolism, including the difficult-to-resolve sugar phosphates, using anion-exchange high-performance liquid chromatography is described. A gradient of decreasing borate concentration (10 to 0 mM) and increasing ionic strength (0 to 150 mM NH4Cl) separates phosphorylated sugars based on the strength of the ester complex that they form with borate anion. Lyophillized samples are reconstituted in a low ionic strength aqueous medium (5 mM triethanolamine-HCl, pH 8.1) and chromatographed on a commercially available anion-exchange column (Hamilton PRP-X100). The process requires only 3 h and permits nanomole detection of the phosphorylated intermediates of the glycolytic and pentose shunt pathways.

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