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10 Cards in this Set
- Front
- Back
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Muscle and liver glycogen have two different functions, because of a particular enzyme associated with glucose. What is it?
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Glucose-6-phospatase. Allows g6P to turn into glucose and enter circulation (muscle cannot do this)
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In fed state, which transporter does liver use for glucose? for muscle?
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Glut2/Glut4
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Anomeric carbon in glycogen is attached to which protein?
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glycogenin
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Glycogen is formed from ____. Glycogen is broken down by?
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Glucose-1-P; Glycogen phosphorylase
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Glycogen synthase requires what molecule for energy?
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UTP is used to create UDP-Glucose; GS makes alpha1,4 linkages on growing glycogen chain.
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What does branching enzyme do?
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Move 7 glucose from the end and add to a branchpoint at least 4 from last branch (4,6 transferase)
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Debranching enzyme is responsible for what two catalytic activities?
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1. 4:4 transferase
2. a-1,6 glucosidase, which releases glucose in unphosphorylated form. |
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Glucagon released how many molecules of glucose?
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1x10^8
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What catalyzes production of UDPG?
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UDPG phosphorylase, from UTP + G1-P
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Muscle glycogen phosphorylation is activated by the presence of what?
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AMP. Inhibited by ATP/ and G6P in resting state.
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