Oxford Events, the new replacement for OxTalks, will launch on 16th March. From now until the launch of Oxford Events, new events cannot be published or edited on OxTalks while all existing records are migrated to the new platform. The existing OxTalks site will remain available to view during this period.
From 16th, Oxford Events will launch on a new website: events.ox.ac.uk, and event submissions will resume. You will need a Halo login to submit events. Full details are available on the Staff Gateway.
Much is known about the motile behavior of the bacterium Escherichia coli. Early work on tracking E. coli and learning about its biased random walk was followed by the realization that bacterial flagella rotate rather than wave or beat. Flagellar rotation is controlled by chemoreceptors at the cell surface. Receptor methylation is required for adaptation on the second time scale, which enables cells to make temporal comparisons and swim up spatial gradients of attractants. Without methylation, one still observes partial adaptation, on the minute time scale, as motors remodel and shift their operating points. Motors also adapt to changes in viscous load. When the load suddenly increases, additional force-generating units are added one by one; thus, the flagellum is a mechanosensor as well as a device for generating thrust. Flagellar filaments grow at their distal ends at a rate that does not to depend upon initial lengths. Single-file diffusion appears to be adequate to get flagellin subunits from the base to the tip.
