Abstract

A comparative study has been made of the ability of metal ions to catalyze the Lobry de Bruyn-Alberda van Ekenstein transformation. An analytical enzymic assay system, which is highly sensitive and selective, was developed to monitor the rates of isomerization of hexose and triose phosphates. The metal ions catalyze the isomerization of hexose phosphates by virtue of their Lewis acid character with the first transition series being most effective. The metal ions also appear to have no ability to direct the course of the reactions. Amino acids also catalyze the isomerization apparently by virtue of the free carboxylate anion.

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