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Cover picture: Photocurrents measured in a dark-adapted single cone isolated from striped bass retina. Peak photocurrent amplitude increases with light intensity up to a saturating amplitude. Current reflects the electrogenic activity of a K+-dependent, Na+/Ca2+ exchanger, which causes changes in intracellular free Ca2+, as measured with a fluorescent dye (see article by Paillart et al., 1–16).
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