Artyom Kopp is in the Section of Evolution and Ecology and Center for Genetics and Development at the University of California − Davis, Davis, California 95616, USA. akopp@ucdavis.edu
The excretory systems of closely related worm species have distinct morphological and functional features. A new study now shows that evolutionary gain of lin-48 expression in the excretory duct cell in Caenorhabditis elegans is responsible for the unique excretory system innovations present in this species.
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