Table 1. Sequence identity between FliF orthologues used in the multiple sequence alignment shown in Fig. 2.

The sequence identity between each pair is indicated, as calculated with the Needleman–Wunsch algorithm.

	Salmonella	E.coli	Yersinia	Bordetella	Pseudomonas	Legionella	Helicobacter	Campylobacter	Listeria	Streptococcus	Vibrio	Bacillus	Clostridium	Treponema
Salmonella	100.0	85.9	62.4	45.1	34.1	34.7	30.7	29.4	23.6	21.7	27.9	24.6	26.2	21.5
E.coli		100.0	62.6	46.2	33.7	34.7	31.4	29.6	22.0	22.0	27.7	25.1	25.0	22.2
Yersinia			100.0	49.2	35.5	34.5	29.6	28.1	21.2	21.1	26.6	24.2	23.9	19.5
Bordetella				100.0	35.9	35.1	29.6	26.3	22.9	21.0	27.5	23.2	22.0	21.6
Pseudomonas					100.0	38.1	28.4	29.0	20.3	20.3	31.0	20.0	22.2	20.3
Legionella						100.0	28.8	26.5	20.2	20.2	29.3	21.2	25.3	20.2
Helicobacter							100.0	43.2	23.7	21.9	23.3	23.8	28.3	24.2
Campylobacter								100.0	22.8	21.2	26.1	23.1	23.3	25.0
Listeria									100.0	37.4	19.8	22.3	24.5	20.5
Streptococcus										100.0	20.5	22.4	24.4	21.3
Vibrio											100.0	19.1	21.8	18.6
Bacillus												100.0	24.6	23.2
Clostridium													100.0	20.7
Treponema														100.0