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SummaryRho-kinase (Rok) is a major myosin II activator during morphogenesis. In the Drosophila embryonic salivary gland placode Rok is planar polarised at the tissue boundary, through a negative regulation by the apical polarity protein Crumbs that is anisotropically localised at the boundary. However, in inner cells of the placode both Crumbs and Rok are isotropically enriched at junctions. We propose a model that reconciles both behaviours through modulation of Rok membrane residence time bydoi:10.1101/615062 fatcat:cfr2muuchfh4tafsdya4xuaywu