| Origin of directionality in the fish stripe pattern. | |
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MedLine Citation:
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PMID: 12666200 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The formation of stripe patterns in animal skin has been explained by the reaction-diffusion (RD) system, a hypothetical chemical reaction proposed by A. Turing. Although animal stripes usually have directionality, the RD model alone cannot explain how the direction is specified. To investigate the mechanism regulating the direction of stripes, we studied stripe pattern formation in two species of Genicanthus during sexual conversion. These species share almost identical morphologic properties, except for their stripe direction. In both species, spots transiently arise at random positions and then combine and rearrange to form directional stripes. Computational analysis has shown that diffusion anisotropy is very effective at specifying the direction of stripes formed by the RD system. Model simulations reproduce the transient dynamics of directional pattern formation observed in fish as well as the resulting stripes. In cases where the magnitude and direction of diffusion anisotropy of the substances are identical, the resulting stripes are not directional. However, if they differ, stripes become directional. As only a small difference in anisotropy is required for this effect, any kind of structure with directional conformation might cause a marked change in stripe direction. Scales are the most likely candidate structure for generating anisotropic interactions in skin. |
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Authors:
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Hiroto Shoji; Atsushi Mochizuki; Yoh Iwasa; Masashi Hirata; Tsuyoshi Watanabe; Syozo Hioki; Shigeru Kondo |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Developmental dynamics : an official publication of the American Association of Anatomists Volume: 226 ISSN: 1058-8388 ISO Abbreviation: Dev. Dyn. Publication Date: 2003 Apr |
Date Detail:
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Created Date: 2003-03-31 Completed Date: 2003-12-29 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9201927 Medline TA: Dev Dyn Country: United States |
Other Details:
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Languages: eng Pagination: 627-33 Citation Subset: IM |
Copyright Information:
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Copyright 2003 Wiley-Liss, Inc. |
Affiliation:
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Department of Biology, Faculty of Sciences, Kyushu University, Fukuoka, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Anisotropy Diffusion Female Fishes / physiology* Male Models, Biological* Sexual Maturation / physiology Skin Pigmentation / physiology* Species Specificity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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