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. 2014 Dec 12;11:71. doi: 10.1186/s12977-014-0071-2

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© Chong et al.; licensee BioMed Central. 2014

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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Presence and absence of dUTPase and env is variable between lineages within ERV3. Maximum likelihood phylogenies were created from the RT domain of Crocodilian ERV3 and ERV3 sequences deposited in Repbase. The ERV3 lineage encoding dUTPase is shaded in grey. Elements encoding a recognisable env are indicated by boxes. Symbols represent the taxa from which the sequences were derived. The numbers of CrocERV groups are shown outside of corresponding consensus sequences. Major retroviral groups are indicated brackets. Numbers within the phylogeny indicate aLRT values greater than 90%. The scale bar indicates branch length.