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Organizing Axes in Time and Space; 25 Years of Colinear Tinkering
Marie Kmita and
Denis Duboule*
During vertebrate development, clustered genes from the Hoxfamily of transcription factors are activated in a precise temporaland spatial sequence that follows their chromosomal order (the"Hox clock"). Recent advances in the knowledge of the underlyingmechanisms reveal that the embryo uses a variety of strategiesto implement this colinear process, depending on both the typeand the evolutionary history of axial structures. The searchfor a universal mechanism has likely hampered our understandingof this enigmatic phenomenon, which may be caused by variousand unrelated regulatory processes, as long as the final distributionof proteins (the HOX code) is preserved.
Department of Zoology and Animal Biology and National Center of Competence in Research "Frontiers in Genetics," University of Geneva, Sciences III, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland.
* To whom correspondence should be addressed. E-mail: denis.duboule{at}zoo.unige.ch
Thomas F. Schultz and Steve A. Kay (18 July 2003) Science301 (5631), 326.
[DOI: 10.1126/science.1085935] |Abstract »|Full Text »|PDF »
REVIEW
Olivier Pourquié (18 July 2003) Science301 (5631), 328.
[DOI: 10.1126/science.1085887] |Abstract »|Full Text »|PDF »
REVIEW
R. Scott Poethig (18 July 2003) Science301 (5631), 334.
[DOI: 10.1126/science.1085328] |Abstract »|Full Text »|PDF »
REVIEW
James C. Carrington and Victor Ambros (18 July 2003) Science301 (5631), 336.
[DOI: 10.1126/science.1085242] |Abstract »|Full Text »|PDF »
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