An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
van Weringh A, Ragonnet-Cronin M, Pranckeviciene E, Pavon-Eternod M, Kleiman L, Xia X.van Weringh A, et al. Among authors: xia x.Mol Biol Evol. 2011 Jun;28(6):1827-34. doi: 10.1093/molbev/msr005. Epub 2011 Jan 7.Mol Biol Evol. 2011.PMID: 21216840Free PMC article.