Biochemistry 2280A Lecture Notes - Lecture 12: Hydrolysis, Atp Hydrolysis, Dietary Fiber

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Topic 9 continued: polysaccharides as energy storage, when animals have too much sugar, we store it as glycogen in our cells. Chains of glucose monomers (12 14 in length), joined by alpha 1 4 linkages. Each chain has 2 branch points with alpha 1 6 linkages. First chain is covalently attached to the protein glycogenin. No reducing ends (when you have an anomeric carbon that is free to open and close the ring) because all the anomeric carbons are all involved in linkages. But/ there are many different end points that the enzymes can chew on. This allows rapid transportation of glycogen since there"s lots of points to attack : when plants have too much sugar, they store it as starch. Similar to glycogen in that it"s based on the alpha 1 4 polyglucose but have fewer branch points. Essentially linear, has very few branch points. Not quite as ordered as animal glycogen but has some branch points.

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