Which of the following is a characteristic of the amino acid composition of a protein which has an isoelectric pH (pI) of 9.5 ?

Question

Quizplus · Accepted Answer

The isoelectric pH (pI) of a protein is the pH at which the net charge of the protein is zero. If a protein has a pI of 9.5, it means that the pH at which it has no net charge is 9.5. In order to achieve this, the protein must have more basic groups (which are positively charged at pH < pI) than acidic groups (which are negatively charged at pH > pI). Therefore, choice D is the correct answer, indicating that the protein has more basic than acidic amino acids.

Which of the Following Is a Characteristic of the Amino