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Cockroach oviducts: The presence and release of octopamine and proctolin

Authors
Journal
Journal of Insect Physiology
0022-1910
Publisher
Elsevier
Publication Date
Volume
33
Issue
4
Identifiers
DOI: 10.1016/0022-1910(87)90047-3
Keywords
  • Octopamine
  • Proctolin
  • Potassium-Induced Release
  • Oviducts
  • Cockroach

Abstract

Abstract The oviducts of the cockroach, Periplaneta americana, contain octopamine (determined by radioenzymatic assay) and proctolin (determined from proctolin-like bioactivity following separation on reversed-phase high performance liquid chromatography). Octopamine content is 5–10-fold greater than proctolin content. Both substances are released in a calcium-dependent manner following depolarisation with high potassium saline. This method resulted in the release of 14% of the total store of octopamine, but only 0.3% of the total store of proctolin. The results are discussed in relation to the recent demonstration of octopamine-containing and proctolin-containing neurones associated with locust oviducts.

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