Volume 285, Issue 2 pp. 170-176
Research Paper
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Evolution of the HOXB6 intergenic region: Motif conservation at the lateral plate mesoderm (LPM) enhancer element

Amos Deinard

Amos Deinard

Department of Genetics, Yale University School of Medicine, New Haven, Connecticut 06520

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Robert Dorit

Robert Dorit

Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut 06511

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Carmela Castiglione

Carmela Castiglione

Department of Genetics, Yale University School of Medicine, New Haven, Connecticut 06520

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Zhiling Jiang

Zhiling Jiang

Scios Nova, Sunnyvale, California 94086

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Diko Becker

Diko Becker

Max-Planck-Institut fur Immunobiologie, Freiburg D-79108, Germany

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Frank Ruddle

Frank Ruddle

Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06511

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Klaus Schugart

Klaus Schugart

Transgene, Strasbourg F-67082, France

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Kenneth Kidd

Corresponding Author

Kenneth Kidd

Department of Genetics, Yale University School of Medicine, New Haven, Connecticut 06520

Department of Genetics, Yale University School of Medicine, New Haven, CT 06520===Search for more papers by this author

Abstract

This study reports the results of a comparative sequencing study in higher primates, focusing on the intergenic region located between HOXB6 and HOXB7. We have examined an 832 bp. region, encompassing a putative Lateral Plate Mesoderm (LPM) enhancer element in a variety of anthropoid apes. The interspecific comparisons reveal extensive substitutions occurring within this region, with a marked bias in favor of C→T transitions within the enhancer element. The pattern of these substitutions suggests that the LPM enhancer region is subject to specific sequence and compositional constraints that are only revealed through comparative sequencing. These constraints produce an enhancer signature, the CpG microisland, which may be useful in identifying additional regulatory elements located within the HOX complexes. J. Exp. Zool. (Mol. Dev. Evol.) 285:170–176, 1999. © 1999 Wiley-Liss, Inc.

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