Letter | Published:

Possible involvement of the plasma membrane in saltatory particle movement in heliozoan axopods

Abstract

THE suggestion that saltatory particle movements in heliozoan axopods, melanophores, nerve axons, as well as in other less specialised cells, are mediated by microtubules has been tendered1–5. This notion is based on morphological observations, and experiments demonstrating the cessation or alteration of movement in response to colchicine, a drug which destroys microtubules3,6–8. Recent evidence, however, does not favour microtubules as the immediate driving force for such systems9–10.

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