AMP is an inhibitor of glycogen phosphorylase.

Glucose-6-phosphate is a negative regulator of glycogen phosphorylase.

The dephosphorylated form of glycogen phosphorylase is less active.

Glucose is a competitive inhibitor of glycogen phosphorylase.

This enzyme is active during times of starvation.

Phosphorolysis

Hydrolysis

Thiolysis

Phosphorylation

Lysis

Activation, conversion from glycogen phosphorylase B to glycogen phosphorylase A

Inactivation, conversion from glycogen phosphorylase B to glycogen phosphorylase A

Activation, conversion from glycogen phosphorylase A to glycogen phosphorylase B

Phosphorylation has no effect

Phosphorylation only confers partial activation