Definition: Connections between cells which allow passage of small molecules and electric current. Gap junctions were first described anatomically as regions of close apposition between cells with a narrow (1-2 nm) gap between cell membranes. The variety in the properties of gap junctions is reflected in the number of CONNEXINS, the family of proteins which form the junctions.
intercellular junctions; A 11 qualif except /cytol /transpl; /genet permitted
See AlsoConnexins ExamplesElectrical Synapses
Other names Junctions, Gap; Junction, Gap; Gap Junction