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Rat skeletal muscle lysosomes contain glycogen

, : Rat skeletal muscle lysosomes contain glycogen. International Journal of Biochemistry 21(5): 561-568

1. A lysosome- and mitochondria-enriched fraction was obtained from rat skeletal muscle using a differential centrifugation procedure. This fraction contained a proportion (3-4%) of the tissue glycogen content. 2. Lysosomes and mitochondria were separated from one another by centrifugation of a cell-free extract upon discontinuous Ficoll-sucrose gradients. Little glycogen was associated with the resulting mitochondrial fraction. The lysosomal fraction, however, contained a significant amount of glycogen, accounting for 5% of the skeletal muscle glycogen. 3. The lysosomal glycogen was purified and found to be enriched in high molecular weight material. 4. The compartmentation of skeletal muscle glycogen metabolism is suggested.


PMID: 2668063

DOI: 10.1016/0020-711x(89)90138-9

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