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Time Space Translation: A Hox Mechanism for Vertebrate A-P Patterning
Authors:AJ Durston   S Wacker   N Bardine   HJ Jansen
Affiliation:1Institute of Biology, University of Leiden, Sylvius Laboratory, Wassenaarseweg 72, 2333 BE, Leiden, Netherlands;2Institute of Biochemistry, Albert- Einstein-Allee 11, University of Ulm, 89081, Ulm, Germany
Abstract:The vertebrate A-P axis is a time axis. The head is made first and more and more posterior levels are made at later and later stages. This is different to the situation in most other animals, for example, in Drosophila. Central to this timing is Hox temporal collinearity (see below). This occurs rarely in the animal kingdom but is characteristic of vertebrates and is used to generate the primary axial Hox pattern using time space translation and to integrate successive derived patterns (see below). This is thus a different situation than in Drosophila, where the primary pattern guiding Hox spatial collinearity is generated externally, by the gap and segmentation genes.
Keywords:Colinearity   Gastrulation   Hox   Metagene   Time Space Translation   Xenopus.
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