FIG. 4.
Results of chemotaxis assays for the ylxL mutant. (A) Bar graph of the average data obtained for several experiments in the plate assay shown in panel B. Results are given as a percentage of the diameter of growth obtained for the wild-type strain (LMB7). (B) Plate assay for chemotaxis and motility in the ylxL strain (LMB231), the wild-type strain (LMB7), and two nonmotile strains, the sigD strain (LMB10) and the fliM strain (LMB4). (C) Results of capillary assay for ylxL mutant (LMB231) compared to wild-type strain (LMB7) for several attractants (asparagine, proline, and mannitol) used at a concentration of 10−5 M. The data given are the average of two experiments for the number of bacteria per capillary (minus the blank).