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<strong>Glycogen</strong> Synthesis<br />

Glucose units are activated for transfer by<br />

formation of sugar nucleotides<br />

• What are other examples of "activation"?<br />

– acetyl-CoA, biotin, THF,<br />

• Leloir showed in the 1950s that glycogen<br />

synthesis depends on sugar nucleotides<br />

• UDP-glucose pyrophosphorylase<br />

– a phosphoanhydride exchange<br />

– driven by pyrophosphate hydrolysis

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