Skew or third moment of bacterial generation times |
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Authors: | W J Voorn L J H Koppes |
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Institution: | (1) Clinical Epidemiology and Biostatistics, University of Amsterdam, Academic Medical Center, P.O. Box 22700, 1100 DE Amsterdam, The Netherlands Tel. +31-72-5402640, NL |
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Abstract: | We studied two statistical hypotheses for the occurrence of cellular division and compared these hypotheses to available
data. The two models were tested by observed distributions of cellular size during steady-state growth. The 30-year-old sloppy
size model could be rejected, whereas the recently developed incremental size proposal could not. The latter proposition was
accepted by default. We concluded that the time between successive divisions is not simply derived from extant size at cellular
division, but rather from interdivisional size increment. We therefore propose that cellular division is regulated by the
need of cells at birth to accumulate a certain amount of mass or something related to mass before division.
Received: 22 December 1996 / Accepted: 6 August 1997 |
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Keywords: | Escherichia coli Kinetics of cellular division Cell size distributions Statistics of size Skewness Kurtosis |
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