منابع مشابه
How Spiroplasma might swim.
Spiroplasmas are small helical bacteria without rigid walls. They have a cytoskeleton in the form of a flat ribbon that runs the length of the cell. In an ordinary liquid medium, a cell spins about its long axis, but it does not translate. In a gel-like medium, containing a viscous agent like methylcellulose, it moves rapidly in a direction parallel to its long axis. Here I suggest how a cytosk...
متن کاملSpiroplasma Swim by a Processive Change in Body Helicity
Microscopic organisms must rely on very different strategies than their macroscopic counterparts to swim through liquid. To date, the best understood method for prokaryotic swimming employs the rotation of flagella. Here, we show that Spiroplasma, tiny helical bacteria that infect plants and insects, use a very different approach. By measuring cell kinematics during free swimming, we find that ...
متن کاملHow Should Microrobots Swim?
Microrobots have the potential to dramatically change many aspects of medicine by navigating through bodily fluids to perform targeted The International Journal of Robotics Research Vol. 28, No. 11–12, November/December 2009, pp. 1434–1447 DOI: 10.1177/0278364909341658 c The Author(s), 2009. Reprints and permissions: http://www.sagepub.co.uk/journalsPermissions.nav Figures 1, 3, 5–10 appear in ...
متن کاملThe archaellum: how Archaea swim
Recent studies on archaeal motility have shown that the archaeal motility structure is unique in several aspects. Although it fulfills the same swimming function as the bacterial flagellum, it is evolutionarily and structurally related to the type IV pilus. This was the basis for the recent proposal to term the archaeal motility structure the "archaellum." This review illustrates the key findin...
متن کاملHow Giardia swim and divide.
To determine how binuclear giardia swim, we used video microscopy to observe trophozoites of Giardia intestinalis, which were labeled with an amino-specific Alexa Fluor dye that highlighted the flagella and adherence disc. Giardia swam forward by means of the synchronous beating of anterior, posterolateral, and ventral flagella in the plane of the ventral disc, while caudal flagella swam in a p...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 2002
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.184.8.2063-2064.2002