The $pK_{a}$ values for the three ionizable groups $X,Y$ and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively
The isoelectric point for the amino acid is :

Question

The $pK_{a}$ values for the three ionizable groups $X,Y$ and Z of glutamic acid are 4.3, 9.7 and 2.2 respectivelyThe isoelectric point for the amino acid is :

Accepted Answer

In acidic medium $\frac{4.3 + 2.2}{2} = 3.25$

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