An enzyme that introduces a phosphate group into an organic molecule, notably glucose.
- In contrast, when athletes stop training, the activities of their muscles' glycolytic enzymes, such as phosphorylase and phosphofructokinase, change little, if at all, for at least four weeks.
- The enzyme activated by glucagon is glycogen phosphorylase.
- A comparison of starch-degrading enzymes showed a slight decrease of starch phosphorylase, unaltered amylase and moderately increased ß-amylase activities.
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