Control of ciliary motility: A unifying hypothesis

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Ciliary motility in ciliates such as Paramecium or Tetrahymena is the mechanism by which cellular behaviour is regulated and on which survival depends. As a consequence, protozoan cilia have elaborate sensing systems built into them, probably by intraciliary transport (ICT-orthologous to intraflagellar transport). As a response to stimuli, 2nd messenger concentration around the axoneme increases. A unifying hypothesis suggests that for rapid responses the 2nd messengers act on axonemal dynein to change the rates of doublet sliding, which in turn affects ciliary parameters that control behaviour.

Document Type: Research Article


Affiliations: Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA;, Email:

Publication date: December 1, 2003

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