Abstract

Kinetic analysis of the glycogen chain growth reaction catalyzed by glycogen phosphorylase b from rabbit skeletal muscle has been carried out over a wide range of AMP concentration under the saturation of the enzyme by glycogen. Applicability of some variants of the kinetic model involving the interaction of AMP- and glucose 1-phosphate-binding sites in the dimeric enzyme molecule is considered. A kinetic model of the enzymatic reaction describing adequately the activation of the enzyme by AMP and inhibition at sufficiently high concentrations of AMP is proposed.

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