Summary: Production of sheathed flagella by strain 0268A was markedly inhibited by growth at 34°C. Flagella produced during growth at 32°C, at which some flagellar inhibition was evident, possessed normal sheath and core components, but at 34°C, irregular “tubule” appendages were sometimes produced in low numbers. Cells rendered aflagellate by growth at 34°C could regenerate normal sheathed flagella at 28°C within half a mean generation time after shift-down, and such regeneration was inhibited by chloramphenicol. The use of the sheathed flagellum of as an experimental model for studies of biosynthesis and self-assembly in complex organelles is suggested.


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