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Plant Physiology 58:240-241 (1976) © 1976 American Society of Plant Biologists Effect of Cyanide on the Plasmalemma Potential of Mnium1a Fachbereich Biologie-Botanik-Technische Hochschule, D 6100, Darmstadt, West Germany
By centrifuging Mnium cuspidatum leaf cells, the cytoplasm can be distinguished from the vacuole and a microelectrode tip can be located unambiguously in the cytoplasm. The site of the electrogenic pump is clearly demonstrated to reside in the plasmalemma as shown by depolarization of the cell electropotential induced by CN.
1 The authors are pleased to acknowledge the support of the Deutsche Forschungsgemeinschaft to U. L., National Science Foundation Grant BMS 74-18627 to N. H., and a visiting professorship to N. H. of the Technische Hochschule Darmstadt, Germany.
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