What are the effects of protein kinase A on PFK-2 and pyruvate kinase?
A) phosphorylates PFK-2; dephosphorylated pyruvate kinase; both enzymes are inhibited
B) phosphorylates both enzymes; inhibits both enzymes
C) dephosphorylates both enzymes; inhibits both enzymes
D) dephosphorylates PFK-2; phosphorylates pyruvate kinase; activates PFK-2; inhibits pyruvate kinase
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