Glycogen phosphorylase displays allosteric activation and inhibition by multiple modes. Which of the following is a correct relation?
A) phosphate: positive heterotropic effector
B) AMP: negative heterotropic effector
C) ATP: positive heterotropic effector
D) glucose-6-phosphate: negative heterotropic effector
E) phosphorylation: covalent inhibitor

Question

Quizplus · Accepted Answer

Glucose-6-phosphate is a negative heterotropic effector of glycogen phosphorylase, meaning it inhibits the enzyme's activity. The other options are not correct: A and C are positive effectors, B is a negative effector but not heterotropic, and E is a covalent modification but not an effector.

Glycogen Phosphorylase Displays Allosteric Activation and Inhibition by Multiple Modes