kindlate valkude poolt moodustunud kanal, mis läbib kahe kõrvutiasetseva loomaraku plasmamembraani, ühendades sellisel viisil rakkude tsütoplasmad, Gap junctions are a specialized intercellular connection between a multitude of animal cell-types.They directly connect the cytoplasm of two cells, which allows various molecules, ions and electrical impulses to directly pass through a regulated gate between cells.