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A self-glucosylating protein (333 aa), a glycosyl transferase, expressed prominently in human skeletal muscle and heart (glycogenin 1), where it primes glycogen granule synthesis. Multiple isoforms of glycogenin 2 are found in the liver. Glycogenin binds glucose from UDP-glucose, further glucose units are added until the chain is around eight units long, then glycogen synthetase continues the process.

Subjects: Chemistry.

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