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.
McClerren AL, Cooper LE, Quan C, Thomas PM, Kelleher NL, van der Donk WA.McClerren AL, et al. Among authors: kelleher nl.Proc Natl Acad Sci U S A. 2006 Nov 14;103(46):17243-8. doi: 10.1073/pnas.0606088103. Epub 2006 Nov 3.Proc Natl Acad Sci U S A. 2006.PMID: 17085596Free PMC article.