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J Neurobiol. 1996 Jul;30(3):340-8.

Passover eliminates gap junctional communication between neurons of the giant fiber system in Drosophila. off.

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1
Department of Biology, Yale University, New Haven, Connecticut 06520, USA.

Abstract

The Passover-related gene family plays significant roles in cellular connectivity. Mutations in three family members from Drosophila and from Caenorhabditis elegans alter a few specific electrical synapses. The passage of cobalt between Drosophila neurons was used to assay the presence of gap junctional connections. The giant fiber in the wild type has specific gap junctional connections in the brain and in the thorax. In flies mutant for Passover, cobalt cannot pass into or out of the giant fiber in either the anterograde or the retrograde directions. A large number of other gap junctional connections remain unaffected. This demonstrates that the Passover gene is necessary for gap-junctional communication between the neurons of the Drosophila giant fiber system.

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