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Zwitterion

Dipolar ion with both negatively and positively charged regions and no net charge.

Molecule that bears equal positive and negative charges at physiological pH (e.g., amino acids with protonated amino and deprotonated carboxyl groups), enabling buffer behavior.

How one textbook covers it

  • Advanced Nutrition and Human Metabolism, 8th ed. (Gropper) — Glossary

    Molecule that bears equal positive and negative charges at physiological pH (e.g., amino acids with protonated amino and deprotonated carboxyl groups), enabling buffer behavior.

Related terms

Amphoteric, Ion