Questions: In Mol*, glycogen phosphorylase a(1 GPA) is immediately displayed as a , whereas glycogen phosphorylase b (8GPB) is displayed as a . - homotetramer; monomer - heterotetramer; homodimer - heterotetramer; monomer - homotetramer; homodimer

In Mol*, glycogen phosphorylase a(1 GPA) is immediately displayed as a , whereas glycogen phosphorylase b (8GPB) is displayed as a . - homotetramer; monomer - heterotetramer; homodimer - heterotetramer; monomer - homotetramer; homodimer
Transcript text: In $\mathrm{Mol}^{*}$, glycogen phosphorylase $a(1 \mathrm{GPA})$ is immediately displayed as a $\qquad$ , whereas glycogen phosphorylase $b$ (8GPB) is displayed as a $\qquad$ homotetramer; monomer O heterotetramer; homodimer heterotetramer; monomer homotetramer; homodimer
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Solution

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The answer is the fourth one: homotetramer; homodimer.

Explanation for each option:

  • Homotetramer; monomer: This option suggests that glycogen phosphorylase a is a homotetramer and glycogen phosphorylase b is a monomer. This is incorrect because glycogen phosphorylase b is not typically found as a monomer.

  • Heterotetramer; homodimer: This option suggests that glycogen phosphorylase a is a heterotetramer and glycogen phosphorylase b is a homodimer. This is incorrect because glycogen phosphorylase a is not a heterotetramer.

  • Heterotetramer; monomer: This option suggests that glycogen phosphorylase a is a heterotetramer and glycogen phosphorylase b is a monomer. This is incorrect for the same reasons as above.

  • Homotetramer; homodimer: This option correctly identifies glycogen phosphorylase a as a homotetramer and glycogen phosphorylase b as a homodimer. Glycogen phosphorylase a is known to form a homotetramer structure, while glycogen phosphorylase b typically forms a homodimer.

In summary, glycogen phosphorylase a is displayed as a homotetramer, and glycogen phosphorylase b is displayed as a homodimer.

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