The third volume is devoted in Inward Rectifier and Intercellular Ligand-Gated Channel Families including those molecular complexes activated by or expressed in: Inwardly rectifying K+ channels; Gap junctions; Mechanical stimuli; Mitochondrial membranes; Nuclear membranes; Aquaporins; Vesicular membranes. Entries provide information on: Nomenclature Expression Sequence analysis Structure and function Electrophysiology Pharmacology Information retrieval