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Journal of Experimental Biology 60,437-444 (1974)
Published by Company of Biologists 1974

Micromanipulation of the Flagellum of Crithidia Oncopelti : I. Mechanical Effects

M. E. J. HOLWILL ¹ and J. L. MCGREGOR ¹

¹ Department of Physics, Queen Elizabeth College, London W8 7AH

1. The behaviour of the flagellum of Crithidia oncopelti when subjected to constriction and dissection by a microprobe was investigated.

2. Constriction of the flagellar tip resulted in wave reversal, whereas dissection of this region allowed normal wave movement.

3. Constriction of the basal region allowed both base-to-tip and tip-to-base propagation.

4. The observed behaviour is more easily explained in terms of a sliding filament model of flagellar movement than by a model which involves local contraction.

Note:

Throughout this paper concentration is expressed as mol m^-3 to be consistent with the S.I. system of units. The relationship between this and the molar (M) unit is 1 mol m^-3 = 1 mM.

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