Assembly of gap junctions, which are found in most animal tissues, and serve as direct connections between the cytoplasms of adjacent cells. They provide open channels through the plasma membrane, allowing ions and small molecules (less than approximately a thousand daltons) to diffuse freely between neighboring cells, but preventing the passage of proteins and nucleic acids. [GOC:jid, ISBN:0716731363]
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C5: Ontology GO: Gene Ontology GO:BP: GO Biological Process