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Effect of elongation of cell body on gliding speed of A- and S-motility. DK10407 (A+S−) (a) and DK1217 (A−S+) (b) were used in this study. Cells with different cell body lengths were obtained by growing cells in CYE with 100 μM cephalexin for various times. The gliding speed was analyzed with time-lapse video microscopy as described in Materials and Methods. Similar results were obtained with other A+S− and A−S+ strains, including DK1300 and DK1218 (data not shown).
