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Mathematical Model for Early Development of the Sea Urchin Embryo

✍ Scribed by Andrea Ciliberto; John J. Tyson

Publisher
Springer
Year
2000
Tongue
English
Weight
277 KB
Volume
62
Category
Article
ISSN
1522-9602

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✦ Synopsis

In Xenopus and Drosophila, the nucleocytoplasmic ratio controls many aspects of cell-cycle remodeling during the transitory period that leads from fast and synchronous cell divisions of early development to the slow, carefully regulated growth and divisions of somatic cells. After the fifth cleavage in sea urchin embryos, there are four populations of differently sized blastomeres, whose interdivision times are inversely related to size. The inverse relation suggests nucleocytoplasmic control of cell division during sea urchin development as well. To investigate this possibility, we developed a mathematical model based on molecular interactions underlying early embryonic cell-cycle control. Introducing the nucleocytoplasmic ratio explicitly into the molecular mechanism, we are able to reproduce many physiological features of sea urchin development.

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