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.
Nickel W, Sohn K, Bünning C, Wieland FT.Nickel W, et al.Proc Natl Acad Sci U S A. 1997 Oct 14;94(21):11393-8. doi: 10.1073/pnas.94.21.11393.Proc Natl Acad Sci U S A. 1997.PMID: 9326620Free PMC article.
Zehe C, Engling A, Wegehingel S, Schäfer T, Nickel W.Zehe C, et al. Among authors: nickel w.Proc Natl Acad Sci U S A. 2006 Oct 17;103(42):15479-84. doi: 10.1073/pnas.0605997103. Epub 2006 Oct 9.Proc Natl Acad Sci U S A. 2006.PMID: 17030799Free PMC article.