Amino acid zwitterion (internal salt) in neutral solution (+H3N-CHR-COO− (dominant near neutral pH for typical amino acids))
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+H3N-CHR-COO− (dominant near neutral pH for typical amino acids)
What each symbol means
| Symbol | What it stands for |
|---|---|
| R | Side chain |
| Zwitterion | Same molecule has + and − centers; net charge can be zero at pI |
When to use this
In intermediate pH, α-carboxyl deprotonated and α-amino protonated for standard amino acids.