Shrew is an essential, recently evolved, Drosophila specific gene required for formation of the embryonic BMP activity gradient
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Patterning the dorsal surface of the Drosophila blastoderm embryo requires the rapid redistribution of a BMP heterodimer (Decapentaplegic/Screw) from lateral regions of the embryo to the dorsal midline as cellularization is completed. BMP redistribution create... ...
