Migration of Dictyosteliumn discoideum slugs results from complex coordinated movements and traction forces of its constituent cells. In this work, we show that two-dimensional (2D) slugs are good models for slug motility studies. They share most of the properties of 3D slugs but are more suitable for microscopy. We performed observations of substrate deformations during 2D slug migration. Traction forces on elastic substrates exerted by the cells are maximal in the central prespore region and absent in the anterior prestalk region.
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