In:
Archaea, Hindawi Limited, Vol. 2, No. 3 ( 2008), p. 159-167
Abstract:
Classification and regression tree (CART) analysis was applied to genome-wide tetranucleotide frequencies (genomic signatures) of 195 archaea and bacteria. Although genomic signatures have typically been used to classify evolutionary divergence, in this study, convergent evolution was the focus. Temperature optima for most of the organisms examined could be distinguished by CART analyses of tetranucleotide frequencies. This suggests that pervasive (nonlinear) qualities of genomes may reflect certain environmental conditions (such as temperature) in which those genomes evolved. The predominant use of GAGA and AGGA as the discriminating tetramers in CART models suggests that purine-loading and codon biases of thermophiles may explain some of the results.
Type of Medium:
Online Resource
ISSN:
1472-3646
,
1472-3654
Language:
English
Publisher:
Hindawi Limited
Publication Date:
2008
detail.hit.zdb_id:
2133011-6
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