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. 2014 Mar 26;14:79. doi: 10.1186/1471-2229-14-79

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Copyright © 2014 McCarthy et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Pectin-methylesterase family tree. Two large polytomies, labeled “A” and “B” and shown in light grey, indicate poor resolution of some of this family’s lineages. Four monophyletic clades contain members from the monocots, eudicots, Selaginella, and Physcomitrella. One of these clades (blue cloud) consists of polytomy B and a smaller clade of Physcomitrella and Selaginella genes. Additional moss and tracheophyte genes remain poorly resolved in polytomy A. The algal root (from P. margaritaceum) is within one of the polytomies.