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.
Jarosz DF, Cohen SE, Delaney JC, Essigmann JM, Walker GC.Jarosz DF, et al.Proc Natl Acad Sci U S A. 2009 Dec 15;106(50):21137-42. doi: 10.1073/pnas.0907257106. Epub 2009 Nov 30.Proc Natl Acad Sci U S A. 2009.PMID: 19948952Free PMC article.