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Fig. 9. paxB cells show reduced motility in synergy experiments. (A) Side view of an Ax2 mound containing 2% EGFP labelled paxBnull cells (green) and 2% mRFPmars expressing Ax2 cells (red). Scale bar, 50 µm. (B) As the mound transforms into a slug the initially uniformly dispersed paxBnull cells are restricted to the posterior of the forming slug. (C) The corresponding cell traces of paxBnull cells (green, n=7 cells) and Ax2 cells (red, n=7) indicate reduced motility and directionality of paxBnull cells during slug formation. Scale bar, 50 µm. See also supplementary material, Movie 6 for dynamics of cell sorting.