Sub-second calcium coupling between outside medium and subplasmalemmal stores during overstimulation/depolarisation-induced ciliary beat reversal in Paramecium cells.

Abstract excerpt

As amply documented by electrophysiology, depolarisation in Paramecium induces a Ca(2+) influx selectively via ciliary voltage-dependent Ca(2+)-channels, thus inducing ciliary beat reversal. Subsequent downregulation of ciliary Ca(2+) has remained enigmatic. We now analysed this aspect, eventually under overstimulation conditions, by quenched-flow/cryofixation, combined with electron microscope X-ray...

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