Polyelectrolytes are polymers whose repeating units bear an electrolyte group. Polycations and polyanions are polyelectrolytes. These groups dissociate in aqueous solutions (water), making the polymers charged. Polyelectrolyte properties are thus similar to both electrolytes (salts) and polymers (high molecular weight compounds) and are sometimes ... Found on http://en.wikipedia.org/wiki/Polyelectrolyte
(from the article `liquid`) ...at one end and a negative charge at the other is called a zwitterion. Very large molecules, such as those of proteins, may have numerous positive ... Found on http://www.britannica.com/eb/a-z/p/90