Zwitterionic vs. Amphoteric — What's the Difference?

A molecule, especially an amino acid, containing a positively charged ion at one end and a negatively charged ion at the other.

Having the characteristics of an acid and a base and capable of reacting chemically either as an acid or a base.

Of or pertaining to a zwitterion.

(chemistry) Having the characteristics of both an acid and a base, and capable of reacting as either; amphiprotic.

Partly one and partly the other; neither acid nor alkaline; neutral.

Relating to or containing an alkali; having a pH greater than 7;