This point was corrected.
In the model that describes the potential activity of the junctional pores (How myxobacteria glide. Curr. Biol. 2002, 12, 369–377) it is not suggested that the nozzle actually “contracts” as mentioned in the ms. The swelling of the slime material in the nozzle fills the nozzle and eventually will generate a counter-force of the nozzle walls of the nozzle that results in the ejection of the slime. Please rephrase the text accordingly.