The isoelectric point of an amino acid is

Question

Quizplus · Accepted Answer

The isoelectric point (pI) of an amino acid is the pH at which it exists in the zwitterion form, meaning it has an equal number of positive and negative charges and a net charge of zero. At the pI, the amino acid's acidic and basic functional groups are fully ionized, resulting in a neutral overall charge. The pK values listed in choices D and E refer to the ionization constants of the acidic and basic groups, but they do not directly determine the pI.

The Isoelectric Point of an Amino Acid Is