Bchbasic
Describe how branching affects glycogen and identify the enzyme that forms branches.
Answer
Glycogen contains alpha-1,4-linked glucose chains and alpha-1,6-linked branch points. The branching enzyme, amylo-1,4 to 1,6-transglucosylase, transfers part of an alpha-1,4 chain to form an alpha-1,6 linkage. This creates a branched glycogen structure.
Explanation
### What a good answer covers
- Glycogen is composed of glucose units.
- Alpha-1,4 linkages form the main chains.
- Alpha-1,6 linkages make branch points.
- Branching enzyme transfers a segment of chain to create the alpha-1,6 bond.
### Terms
- **Branching enzyme**: The enzyme that introduces alpha-1,6 linkages into glycogen.
- **Transglucosylase**: An enzyme that transfers a glucose-containing segment.
### Remember
Alpha-1,4 means chain; alpha-1,6 means branch.
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