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.
Song X, Leehy K, Warrington RT, Lamb JC, Surovtseva YV, Shippen DE.Song X, et al. Among authors: shippen de.Proc Natl Acad Sci U S A. 2008 Dec 16;105(50):19815-20. doi: 10.1073/pnas.0807867105. Epub 2008 Dec 8.Proc Natl Acad Sci U S A. 2008.PMID: 19064932Free PMC article.
Song J, Logeswaran D, Castillo-González C, Li Y, Bose S, Aklilu BB, Ma Z, Polkhovskiy A, Chen JJ, Shippen DE.Song J, et al. Among authors: shippen de.Proc Natl Acad Sci U S A. 2019 Dec 3;116(49):24542-24550. doi: 10.1073/pnas.1915312116. Epub 2019 Nov 21.Proc Natl Acad Sci U S A. 2019.PMID: 31754031Free PMC article.