The attraction between a positively charged atom (cation) and a negatively charged atom (anion), as in a crystal of common table salt (NaCl); also known as an ionic bond. Electrostatic bonds are called salt linkages in the older literature. In proteins, the positively charged side groups of lysine and arginine form electrostatic bonds with the negatively charged side groups of aspartic and glutamic acids. This stabilizes the tertiary and quaternary structures of these molecules. See amino acids, protein structure.
Subjects: Genetics and Genomics — Chemistry.