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Isoelectric Point of a Peptide

4. Protein Structure / Isoelectric Point of a Peptide / Problem 4

Problem 4

Calculate the isoelectric point for a peptide with pKa values of 3.1, 5.5, and 8.2, where the neutral net charge occurs between 5.5 and 8.2.

A

6.85

B

4.3

C

5.5

D

7.0