Abstract

Yeast hexokinase (EC 2.7.1.1) catalyzes the phosphorylation of d-glucal and methyl (α- and β- d-glucopyranosides at 1–5 % of the rates of phosphorylation of d-glucose and 2-deoxy- d-glucose. Maltose, cellobiose, d-galactal andtetrahydropyran-2-methanol are not substrates of hexokinase. Enzymatically synthesized d-glucal-6-phosphate inhibits rabbit muscle phosphoglucose isomerase competitively ( K I = 1.94 mM) and phosphoglucomutase noncompetitively ( K I = 0.122 mM).

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