Files in this Data Supplement:
Fig. S1, pedigree of some ancestral strains of LMG194 and their fliC alleles
Fig. S2, determination of the helical handedness of flagella
Fig. S3, flagella on the nonmotile E. coli strains created in this study
Fig. S4, plot of curvature against twist for the major helical forms produced by different mutants
Table S1, primers
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