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How does insulin inactivate glycogen synthase kinase? By activating a kinase that phosphorylates the active form...

How does insulin inactivate glycogen synthase kinase?

By activating a kinase that phosphorylates the active form of glycogen synthase kinase, thereby inactivating it.

Insulin is a kinase -- an enzyme that phosphorylates various proteins -- and among the proteins it phosphorylates is glycogen synthase.

Insulin enters sensitive cells (cells having the insulin receptor) and binds to glycogen synthase, inactivating it.

All of the above.

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