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Growth of flagella in the periplasm in flgG* mutant strains. Strains that carry only a flgG* allele TH9613 [flgG*5662 (G65E)] (top) and TH10080 [flgG*5670 (G183R)] (bottom) were subject to lysozyme treatment in order to visualize flagellar structures growing in the periplasmic space by electron microscopy. (Bottom) Occasionally, membrane-enveloped flagellar filaments structures were observed.
