Video S3

Myosin dynamics in wild type and Grh KD. Notum epithelia expressing Sqh::GFP labeling myosin. Wild type shown on left and Grh KD shown on the right. White arrowhead shows progression of myosin flow and cable formation in wild type. Red arrowhead shows progression of myosin flow and ectopic cable formation in Grh KD. Images were acquired using a spinning disk imaging system (Revolution XD; Andor Technology). Frames were taken every 1 min. Scale bar: 20 μm.