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. 2017 Jun 7;7:2997. doi: 10.1038/s41598-017-02959-8

Figure 1.

Figure 1

Electron microscopy images of B. terrae BS001 wild-type and mutant strains sampled from soft agar. 0.25%, sampled from 2.5 g/L agar; 0.6%, sampled from 6 g/L agar. Wild-type: wild-type BS001 strain; ΔsctD: BS001 ΔsctD mutant strain; ΔpilN: BS001 ΔpilN mutant strain; ΔfliF: BS001 ΔfliF mutant strain. All the flagellum-positive strains (wild-type strain, BS001 ΔsctD mutant strain, BS001 ΔpilN mutant strain) can synthesize flagella on semi-solid agar whereas BS001 ΔfliF mutant strain could not form any flagella.