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- W2111485477 abstract "Abstract Motivation: Previous studies have shown that accounting for site-specific amino acid replacement patterns using mixtures of stationary probability profiles offers a promising approach for improving the robustness of phylogenetic reconstructions in the presence of saturation. However, such profile mixture models were introduced only in a Bayesian context, and are not yet available in a maximum likelihood (ML) framework. In addition, these mixture models only perform well on large alignments, from which they can reliably learn the shapes of profiles, and their associated weights. Results: In this work, we introduce an expectation–maximization algorithm for estimating amino acid profile mixtures from alignment databases. We apply it, learning on the HSSP database, and observe that a set of 20 profiles is enough to provide a better statistical fit than currently available empirical matrices (WAG, JTT), in particular on saturated data. Availability: We have implemented these models into two currently available Bayesian and ML phylogenetic reconstruction programs. The two implementations, PhyloBayes, and PhyML, are freely available on our web site (http://atgc.lirmm.fr/cat). They run under Linux and MaxOSX operating systems. Contact: nicolas.lartillot@lirmm.fr Supplementary information: Supplementary data are available at Bioinformatics online." @default.
- W2111485477 created "2016-06-24" @default.
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- W2111485477 date "2008-08-21" @default.
- W2111485477 modified "2023-10-16" @default.
- W2111485477 title "Empirical profile mixture models for phylogenetic reconstruction" @default.
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- W2111485477 doi "https://doi.org/10.1093/bioinformatics/btn445" @default.
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