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[45] [46] However, unlike the bacterial flagellum archaellum has not shown to play a role in archaeal biofilm formation. [47] In archaeal biofilms, the only proposed function is thus far during the dispersal phase of biofilm when archaeal cells escape the community using their archaellum to further initiate the next round of biofilm formation.
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Archaeal flagella are superficially similar to bacterial flagella in that it also has a rotary motor, but are different in many details and considered non-homologous. [ 18 ] [ 19 ] [ 20 ] Eukaryotic flagella—those of animal, plant, and protist cells—are complex cellular projections that lash back and forth.
Bacterial flagella are helical filaments, each with a rotary motor at its base which can turn clockwise or counterclockwise. [16] [17] [18] They provide two of several kinds of bacterial motility. [19] [20] Archaeal flagella are called archaella, and function in much the same way as bacterial flagella
Bacterial flagella are helical filaments, each with a rotary motor at its base which can turn clockwise or counterclockwise. [117] [118] [119] They provide two of several kinds of bacterial motility. [120] [121] Archaeal flagella are called archaella, and function in much the same way as bacterial
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The recently elucidated archaeal flagellum, or archaellum, is analogous—but not homologous—to the bacterial one. In addition to no sequence similarity being detected between the genes of the two systems, the archaeal flagellum appears to grow at the base rather than the tip, and is about 15 nanometers (nm) in diameter rather than 20.
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