Additional file 1: Movie 1.

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A single oscillation of eve1 expression. Possible representation of a single oscillation of eve1 expression, obtained by overlapping ordered embryos A-D of Figure  4 (younger embryo on top), with increasing transparency of the younger embryo in each sequential frame. The ring corresponding to the 24th LBS (marked by red arrows), external to the dynamic peri-proctodeal area, shows no detectable movement over this time window.

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Brena and Akam BMC Biology 2013 11:112   doi:10.1186/1741-7007-11-112