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3094 Biochemistry

A young male presents complaining of an inability to perform strenuous exercise without bringing on painful muscle cramps and weakness. When he was administered an ischemic exercise test, his serum lactate concentrations did not increase significantly. A deficiency in which of the following enzymes is most likely the cause of the patient’s muscle cramps?

AGlycogen phosphorylase
BCarnitine palmitoyl transferase II
CGlucose-6-phosphatase
DGlycogen synthase
Biochemistry
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