Glycogen synthase kinase (GSK3):
A) is inhibited by phosphorylation of a tyrosine in GSK3.
B) inhibits glycogen synthase.
C) is a tyrosine kinase.
D) is both inhibited by phosphorylation of a tyrosine in GSK3 and is a tyrosine kinase.
E) both inhibits glycogen synthase and is a tyrosine kinase.

Question

Quizplus · Accepted Answer

GSK3 inhibits glycogen synthase, but it is not inhibited by phosphorylation of a tyrosine in GSK3, nor is it a tyrosine kinase. Therefore, choices A, C, D, and E can be ruled out.

Glycogen Synthase Kinase (GSK3)