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17 Cards in this Set
- Front
- Back
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2 roles of glycogen are:
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buffer blood glucose levels and provide a means of storing glucose for strenous muscular activity
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In muscle cells, glucose 6 P does what?
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feeds directly into glycolysis
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In liver, glucose-6-P does what?
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Uses Glu 6 Phosphatase to directly release glu. into bld.
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Cleavage of alpha 1,4 glycosidic bonds is by?
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glycogen phosphorylase
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What enzyme shifts 3 residues to acceptor branch?
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transferase
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What enzyme hydrolyzes the single remaining glucose?
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alpha 1,6 glucosidase
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What converts glu 1-P to glu 6-P?
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phospho glucomutase
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What releases free glucose into the blood after glycogen breakdown?
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glucose 6 Phosphatase
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Biosyntheses of glycogen requires what?
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UDP - glucose
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Enzyme used to catalyze UTP + glucose 1 P to UDP glucose is?
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udp glucose pyrophophorylase
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formation of alpha 1,4 glycosidic bond is catalyzed by?
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glycgen synthase
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what enzyme primes the chain by adding four residues?
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glycogenin
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glucosyl units are added to what end of the growing glycogen chain?
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non reducing termini
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what enzyme allows for branching of glycogen?
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branching enzyme
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Why do we need it branched?
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Inc. solubility and faciliate the rate of degradation and synthesis
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What are the requirements for the branching enzyme
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moves groups of 7 residues from a chain at least 11 subunits long. New branch pt has to be at least 4 positions away from its nearest neighbor.
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WHy is processs so precise?
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allows for less enzymes for degradation and synthesis.
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