Finally, the authors performed a detailed characterization of the motility of individual filaments of the organism by time lapse microscopy providing additional evidence that would appear to support polysaccharide secretion as the driving force for motility, and provide a model for how this motility drives the formation of supercellular structures; in this case, spirals.
In Lines 309–315: References 17 and 22 are accurately described, however these models relate to gliding in Myxobacteria, a distinction not noted in the text. Thus, comparisons between these models (including the focal adhesion model) and the current model are only valid if the mechanism of motility in these microorganisms is the same. The authors should (briefly) explain their reasoning on the validity of comparing these two systems, and the implications of their findings to motility in Myxobacteria.