Abstract
1. 1. Sulphate ions activate partially-purified human platelet phosphofructokinase. This is caused by suppression of the cooperativity of the enzyme with respect to fructose 6-phosphate.
2. 2. Sulphate therefore markedly affects the influences of allosteric modifiers such as ADP, 3′,5′-cyclic AMP and citrate.
3. 3. The role of sulphate in assay mixtures
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