Which Statement Does NOT Describe a Characteristic of Phosphoprotein Phosphorylase-1

Multiple Choice

Which statement does NOT describe a characteristic of phosphoprotein phosphorylase-1 (PP1) ?

A) PP1 can be phosphorylated by protein kinase A (PKA) .
B) PP1 can dephosphorylate glycogen phosphorylase, glycogen synthase, and phosphorylase kinase.
C) PP1 is allosterically activated by glucose-6-phosphate.
D) PP1 is inhibited by activated glycogen phosphorylase
E) PP1 is phosphorylated by glycogen synthase kinase-3 (GSK3) .