What is the result of PKB phosphorylation in the context of insulin signaling?

• A. PKB phosphorylation increases GLUT4 expression and glycogen synthesis, reducing blood glucose levels.
• B. PKB phosphorylation inhibits GLUT4 expression and glycogen synthesis.
• C. PKB phosphorylation decreases GLUT4 expression and glycogen synthesis, increasing blood glucose levels.
• D. PKB phosphorylation has no effect on GLUT4 expression or glycogen synthesis.

Answer: (A)