Gap junctions form conduits between adjacent cells that are composed of connexin protein subunits and provide direct intercellular communication pathways allowing rapid exchange of ions and metabolites (PMID: 12126230; 15094343). Connexins are four-pass transmembrane proteins with amino- and carboxy-terminal regions facing the cytoplasm. A connexon is composed of a hexamer of connexins. GJB6 (gap junction beta-6 protein, also known as connexin-30) is a member of the connexin family of proteins. GJB6 is a component of the gap junction networks of the cochlea.