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Curr Biol. 2004 Jul 27;14(14):R557-9.

Arthropod segmentation: why centipedes are odd.

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  • 1Institute for Genetics, Department for Evolutionary Genetics, University of Cologne, Weyertal 121, D-50931 Köln, Germany.


Recent work has revealed a double segmental periodicity of gene expression in the centipede, a potential molecular explanation for the observation that this arthropod always has an odd number of trunk segments. Is this an oddity of centipedes, or might it mean that double segmental pair-rule patterning dates back to the Ur-arthropod?

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