Abstract
THERE are two simple ways in which the observed screw-like propulsive motion of bacterial flagella can be understood. Either, first, the flagellum is like a rigid corkscrew rotating in a sort of journal bearing in the cell wall (hypothesis A) or, second, the flagellum is firmly attached to the cell wall and moves by the propagation of helical waves (hypothesis B).
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CALLADINE, C. Bacteria can swim without rotating flagellar filaments. Nature 249, 385 (1974). https://doi.org/10.1038/249385a0
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DOI: https://doi.org/10.1038/249385a0
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