Calcium activates an electrogenic proton pump in neurospora plasma membrane.
Calcium ionophoresis into coenocytic cells of Neurospora crassa activates the plasma membrane proton pump as measured by current-voltage analysis. This is direct evidence that intracellular calcium regulates the activity of a key transport enzyme found in higher plants and fungi.
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Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut 06510.