Biological Amines and the Henderson- Hasselbalch Equation Cellular amines are written in their protonated forms Amino acids shown in their ammonium carboxylate form to reflect their structures at physiological pH The amino group is The carboxylic acid group protonated at pH 7.3. is dissociated at pH 7.3. C02 Alanine (an amino acid)Cellular amines are written in their protonated forms ▪ Amino acids shown in their ammonium carboxylate form to reflect their structures at physiological pH Biological Amines and the Henderson￾Hasselbalch Equation