A macro-ion of a @AT07196@ (in particular a protein) is said to be isoionic if besides the @AT07196@ and H+ or OH− ions (in general ions of the solvent) no other ions are present in the system.
Source: PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 618 [Terms] [Paper]
Citation: 'isoionic' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.I03282 RISBibTexEndNote