Question

The isoelectric point of an amino acid is defined as

Answer 1

✳️ Isoelectric point of the amino acid is defined as the point at which a molecule exist as zwitter ion with no net charge.

$\: \: \: \:$

I hope it's help you.

Answer 2

When an amino acid is present in its zwitterion form, the overall charge on it is zero.

• A zwitterion is an ion that has both positive as well as negative charges on it. But the net charge is zero.
• The isoelectric point is represented by the symbol=pI
• Formula of pI is :

            pI = ( pKa1 + pKa2) / 2

• pKa1 is for the carboxylic group deprotonation

• pKa2 is for the amine group protonation