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56325 Biochemistry

A 3-month-old infant was cranky and irritable, became quite lethargic between feedings, and began to develop a potbelly. A physical examination demonstrated an enlarged liver, while blood work taken between feedings demonstrated elevated lactate and uric acid levels, as well as hypoglycemia. This child most likely has a mutation in which one of the following enzymes?

ALiver glycogen phosphorylase
BGlycogen synthase
CGlucose-6-phosphatase
DMuscle glycogen phosphorylase
Biochemistry
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