The home of SwiftCraftyMonkey! Join Susan as she obsesses about cosmetic chemistry and other things (some possibly related to monkeys). Often strange, occasionally useful, and always worth a stop as a point of interest on your journey through the Intertron.
The isoelectric point is the point where the molecule is non-ionic or has a neutral electrical charge. Below that point, the molecule is cationic. Above that point, the molecule is anionic.