Chapter 28 - Chemistry of the Living State - 28-3 Concept Assessment - Page 1281: 28-3

Ionization does not occur anywhere along the chain, but it only occurs at the N-terminal and C-terminal end. Because the PH values of the N-terminal and C-terminal amino acids are one unit higher than their isoelectric point, the only considerable ionization is at the C-terminal amino acid, that would be present as the anion, (1-). This would make the net charge on the tripeptide (1-).

Ionization does not occur anywhere along the chain, but it only occurs at the N-terminal and C-terminal end. Because the PH values of the N-terminal and C-terminal amino acids are one unit higher than their isoelectric point, the only considerable ionization is at the C-terminal amino acid, that would be present as the anion, (1-). This would make the net charge on the tripeptide (1-).