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Photoreceptor ion channels reconstituted in bilayer lipid membranes

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1 Author(s)
Takagi, M. ; Coll. of Gen. Educ., Osaka Univ., Japan

Ion channel molecules in octopus photoreceptor cell membranes were reconstituted in bilayer lipid membranes (BLMs) prepared by the modified monolayer-dipping method. Many kinds of single-channel currents (8-500 pS) were recorded in a BLM that contained a microvillus membrane preparation purified by sucrose density gradient centrifugation. In membranes obtained by a novel filter paper method, only the activity of a low conductance ion channel (10-30 pS) was obtained. It is believed that this may by the ion channel that operates as an electric signal generation in the process of transmitting photo-information in the visual cell

Published in:

Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in

Date of Conference:

9-12 Nov 1989