ON THE EXISTENCE AND UNIQUENESS OF BIOLOGICAL CLOCK MODELS MATCHING EXPERIMENTAL DATA

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The development of luciferase markers and other experimental techniques has allowed measurement of the timecourses of the expression of genes and proteins with remarkable accuracy. Since these data have been used to develop many mathematical models, it is important to ask whether this problem of model building is well-posed. Here, we focus on a common form of ordinary differential equation (ODE) models for biological clocks, which consist of production and degradation terms, and assume we have an accurate measurement of their solution. Given these solutions, do ODE models exist? If they exist, are they unique? We show that timecourse data can sometimes, but not always, determine the unique quantitative relationships (i.e., biochemical rates) of network species. In other cases, our techniques can rule out functional relationships between network components and show how timecourses can reveal the underlying network structure. We also show that another class of models is guaranteed to have existence and uniqueness, although its biological application is less clear. Our work shows how the mathematical analysis of the process of model building is an important part of the study of mathematical models of biological clocks.
Publisher
SIAM PUBLICATIONS
Issue Date
2012
Language
English
Article Type
Article
Keywords

MAMMALIAN CIRCADIAN CLOCK; NEGATIVE FEEDBACK; RHYTHM

Citation

SIAM JOURNAL ON APPLIED MATHEMATICS, v.72, no.6, pp.1842 - 1855

ISSN
0036-1399
DOI
10.1137/120867809
URI
http://hdl.handle.net/10203/203044
Appears in Collection
MA-Journal Papers(저널논문)
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