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Organization of gap junction proteins. This is a schematic presentation of different types of connexons. A homomeric connexon refers to a connexon formed when 6 identical connexin proteins form the pore for a gap junction. A heteromeric connexon refers to a connexon formed between different connexin subunits. Two identical connexons form a homotypic gap junction, whereas a heterotypic gap junction consists of 2 different hemichannels.
