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Magazine Chapter 16: Q16BE (page 557)
Glycogen Phosphorylase Structure and Activity
Short Answer
Expert verified
Answer:
- The glycogen phosphorylase monomer is found to be a large protein molecule, which is composed of 842 amino acids with a mass of 97.434 kDa in muscle cells.
- Even though the enzyme glycogen phosphorylase can exist as an inactive monomer or tetramer, it is biologically active as a dimer of two identical subunits. Glycogen phosphorylase works by breaking up glycogen into glucose subunits.
Step by step solution
01
Glycogen Phosphorylase Structure
02
Glycogen Phosphorylase Activity.
- This glycogen phosphorylase plays a fundamental role in glucose metabolism. It helps in the release of monomers of glucose molecules from the glycogen polymer.
- In the study, it was seen that the glycogen phosphorylase can only act on the linear chains of glycogen. The work of this enzyme will immediately come to a halt four residues away from the 伪1-6 branch.
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