| connexin | <cell biology, protein> A group of homologous proteins which form the intermembrane channels of gap junctions. They appear to be the major structural proteins of the connexon and are the products of an identified gene family which has both highly conserved and highly divergent regions. The variety contributes to the wide range of functional properties of gap junctions. (18 Jul 2002) |
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| connexin 43 | <protein> A 43 kD peptide which is a member of the connexin family of gap junction proteins. Connexin 43 is a product of a gene in the alpha class of connexin genes (the alpha-1 gene). It was first isolated from mammalian heart, but is widespread in the body including the brain. (12 Dec 1998) |