Zwitterion
A molecule with an equal number of positive and negative charges and a therefore a net charge of zero. Most amino acids are zwitterions at neutral pH, bearing a negatively charged carboxylate and a positively charged ammonium.
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A molecule with an equal number of positive and negative charges and a therefore a net charge of zero. Most amino acids are zwitterions at neutral pH, bearing a negatively charged carboxylate and a positively charged ammonium.