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In [[biology]], a '''connexon''' is an assembly of 6 proteins called [[connexin]]s that forms a bridge called a [[gap junction]] between the [[cytoplasm]] of two adjacent [[cell (biology)|cells]].  The connexon is actually the hemichannel supplied by a cell on one side of the junction; two connexons from opposing cells normally come together to form the complete intercellular gap junction channel.  However, in some cells, the hemichannel itself is active as a conduit between the cytoplasm and the [[extracellular space]].
[[Image:Connexon and connexin structure.svg|thumb|center|501px]]




[[Category:Membrane biology]]

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