Zwitterion
= Zwitterion
{wiki}
= Zwitterionic
{synonym}
A <zwitterion> has opposite formal <electric charges> in different regions of a <molecule>, with zero net <electric charge>. <Phosphatidylcholine> provides a membrane-related example. This is stronger than merely having <chemical polarity> through fractional <partial atomic charges>. See https://goldbook.iupac.org/terms/view/Z06752[IUPAC Gold Book: zwitterions].