PROBLEM SET 23. SYNTHESIS OF STARCH AND GLYCOGEN

  1. Amylose is formed from glucose residues linked a-1,4. Write a generalized structure for amylose.
  2. Amylopectin is amylose with a-1,6 branches. Glycogen is like amylopectin, but with more branches. Write a generalized structure for amylopectin showing one branch.
  3. Phosphorolysis of glycogen produces α-D-glucose 1-phosphate. Write two mechanisms that would explain this result.
  4. Conversion of G-1-P to G-6-P requires G-1,6-DP. Show how this works.
  5. Synthesis of glycogen requires uridine diphosphate glucose (UDPG). UDPG is formed from UTP and G-1-P. Show how UDPG is formed.
  6. Show how UDPG adds glucose residues to glycogen.
  7. Branching in glycogen is an internal reaction. Show this can occur.

 

 

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