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Fig. 6. A broad shear zone develops at the equator of BDM-treated activated
eggs. The frame from a side-view time-lapse sequence spanning a 20 minute
period at the beginning of torsion (see Movie S3 in the supplementary
material). Motion of individual pigment granules (marks 1-6) traced via
time-lapse is indicated by colored tracks. The colored bar indicates a 20
minute time interval (blue: start of tracking; red: +20 minutes).