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- W1577909427 abstract "When a Euglena, in a medium containing ATP, is microinjected with 7 × 10−14 l of 0.02 M EDTA, which binds Ca2+ and Mg2+, flagellar motility stops. Flagellar arrest in Chlamydomonas occurs with the injection of 2 × 10−14 l of 0.02 M EDTA. The injection of similar amounts (7 × 10−14 l in Euglena and 3 × 10−14 l in Chlamydomonas) of 0.02 M EGTA, which preferentially binds Ca2+, did not significantly alter flagellar motility. This suggests that a decrease in the internal Ca2+ concentration in Euglena or Chlamydomonas did not stimulate flagellar beating. Further, flagellar motility decreased when internal Mg2+ was chelated. The microinjection of Zn2+ into these cells caused a decrease in flagellar frequency analogous to the decrease in frequency caused by the injection of Ca2+ and EDTA. The microinjection of 7 × 10−14 l of 0.2 M Mn2+ caused an approx. 1.5-fold increase in Euglena flagellar motility. Chlamydomonas flagella, which cease to beat upon impalement in an Mg2+-free medium, resume a flagellar frequency of 18 Hz when injected with 3 × 10−14 l of 0.2 M Mn2+. In the experiments reported here, Mn2+ acts as an analog of Mg2+." @default.
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- W1577909427 date "1978-10-01" @default.
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- W1577909427 title "Control of flagellar motility in Euglena and Chlamydomonas" @default.
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- W1577909427 doi "https://doi.org/10.1016/0014-4827(78)90456-1" @default.
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