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Video 1
A time-course video showing the chromatin organization (labeled by histone-GFP) during early development (1-3 h AED) of a wild-type Drosophila embryo injected with guinea pig preimmune serum. Histone-GFP, green. Images were captured at 1 frame/10 s and are displayed at 20 frames/s (∼200x speed).