Required for adventurous-gliding motility (A motility), in response to environmental signals sensed by the frz chemosensory system. Forms ordered clusters that span the cell length and that remain stationary relative to the surface across which the cells move, serving as anchor points (focal, transient adhesion sites) that allow the bacterium to move forward. Clusters disassemble at the lagging cell pole. Interacts with MglA. In motile cells, localizes in ordered clusters spanning the cell length. In stalled cells, localizes at the leading cell pole. Slip sliding away - Issue 81 of April 2007