One cytoplasmic aspect of the junctional membrane between coupled pairs of Fundulus blastomeres was perfused with solutions of known H and Ca ion concentrations. Conductance of junctional membrane was decreased by either ion. The sensitivity to H ions was about 10,000 times greater than that to Ca ions. The results suggest that junctional conductance can be modulated by changes in H ion concentration near physiological pH, but that unphysiologically high concentrations of Ca ion, such as would be reached only on cell death, are required for comparable changes in junctional conductance.
|Original language||English (US)|
|Number of pages||5|
|Journal||Proceedings of the National Academy of Sciences of the United States of America|
|Issue number||2 I|
|State||Published - 1982|
All Science Journal Classification (ASJC) codes