Movie 6.

Time-lapse imaging of morula to blastocyst transition following morula aggregation of STC receiver and CmGP1GH1 sender cells. Time-lapse imaging of two wild-type morulae aggregated with STC clone A1 receiver cells and CmGP1GH1 sender cells. Brightfield (grey), EGFP (green) and mCherry (red) images taken every 30 minutes over a 27 hour 15 minute period. tagBFP-3xNLS (blue) was acquired for the first timepoint only, as sustained exposure to ultraviolet light results in death of chimaeric morulae. Filming started approximately 4 hours after morula aggregation.