RT Book, Section A1 Kishnani, Priya S. A1 Chen, Yuan-Tsong A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 6726054 T1 Chapter 154. Disorders of Glycogen Metabolism T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=6726054 RD 2024/03/29 AB Glycogen, the storage form of glucose in animal cells, is composed of glucose residues joined in straight chains by α–1,4 linkages and branched at intervals of 4 to 10 residues with α–1,6 linkages. The treelike molecule can have a molecular weight of many millions and may aggregate to form structures recognizable by electron microscopy. In muscle, glycogen forms β particles, which are spherical and contain up to 60,000 glucose residues. Each β particle contains a covalently linked protein called glycogenin. Liver contains β particles and rosettes of glycogen called α particles, which appear to be aggregated β particles.