Gap Junction (nexus): a specialized intercellular connection between a multitude of animal cell-types; directly connects the cytoplasm of 2 cells, which allows various molecules and ions to pass freely between cells; one gap junction channel is composed of two connexons (hemichannels) which connect across the intercellular space; gap junctions are analogous to the plasmodesmata that join plant cells
explore-blog: So clever – the human body visualized as a subway map by designer Sam Loman, a fine addition to these visual metaphors using he London Tube map. Also see these vintage illustrations envisioning the body as a machine. Mind the gap junctions. Updated version here.
Gap Junctions are channels between cell membranes that allow ions and small molecules to pass directly from one cell to another. These channels are formed by membrane proteins called connexins. Six connexins in the cell membrane form a channel called a connexon. Connexons from two cells form a gap junction. Gap junctions permit electrical signals to pass directly from one cell to another.
Pathway Central: Signaling in Gap Junction Gap Junction (GJ) channels span two plasma membranes and are formed by the alignment of two hemichannels, each consisting of an oligomer of structural subunit proteins, called Cxs (Connexins). These junctional proteins constitute a multigene family whose members are distinguished according to their predicted molecular weight. i
PACEMAKER CELLS & CONNEXONS ----- 2 connexons (one from each neighbor cell) make a gap junction. These gap junctions allow calcium from one cell to travel to another, creating a wave of action potentials across the muscle cells. This happens in the heart and the uterus, both of which are myogenic, thanks to these connections called connexons. The connexin proteins form a flower-shape arrangement which is a connexon.
Cell Junction (intercellular bridge) of plasma membrane: a type of structure that exists within the tissue of some multicellular organisms (animals); consist of multiprotein complexes that provide contact between neighboring cells or between cell and the extracellular matrix, strengthen tissues and allow the exchange of metabolites; especially abundant in epithelial tissues; types: adherens junctions, desomosomes, hemidesomosomes, gap junctions, tight junctions; contain proteins and…