If PEP labeled with 14 C at C2 was run through gluconeogenesis to produce glucos

Question

If PEP labeled with 14C at C2 was run through gluconeogenesis to produce glucose 6-phosphate, where would the label appear in the resulting glucose 6-phosphate molecules?

Question 22 options:

C1 only

C1 and C6

C2 only

C2 and C5

C3 only

C3 and C4

C4 only

C4 and C5

C5 only

C5 and C6

C6 only

none of the other choices is correct; the labeled carbon would be lost as carbon dioxide during the PEP carboxykinase reaction.

C1 only

C1 and C6

C2 only

C2 and C5

C3 only

C3 and C4

C4 only

C4 and C5

C5 only

C5 and C6

C6 only

none of the other choices is correct; the labeled carbon would be lost as carbon dioxide during the PEP carboxykinase reaction.

Explanation / Answer

If PEP labelled with 14C at C2 is used in glucogenesis, the label would be found at,

C2 and C5

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