If the pka of a histidine residue in the active site of an


Querstion - If the pKa of a histidine residue in the active site of an enzyme has been shifted to 5.1 and the pH of the organelle containing the enzyme is 5.5, what fraction of this residue will be + charged?

a. 28%

b. 40%

c. 55%

d. 67%

e. 75%

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Chemistry: If the pka of a histidine residue in the active site of an
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