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.
Henikoff S, Ahmad K, Platero JS, van Steensel B.Henikoff S, et al.Proc Natl Acad Sci U S A. 2000 Jan 18;97(2):716-21. doi: 10.1073/pnas.97.2.716.Proc Natl Acad Sci U S A. 2000.PMID: 10639145Free PMC article.
Ahmad K, Henikoff S.Ahmad K, et al. Among authors: henikoff s.Proc Natl Acad Sci U S A. 2002 Dec 10;99 Suppl 4(Suppl 4):16477-84. doi: 10.1073/pnas.172403699. Epub 2002 Aug 12.Proc Natl Acad Sci U S A. 2002.PMID: 12177448Free PMC article.Review.
McKittrick E, Gafken PR, Ahmad K, Henikoff S.McKittrick E, et al. Among authors: henikoff s.Proc Natl Acad Sci U S A. 2004 Feb 10;101(6):1525-30. doi: 10.1073/pnas.0308092100. Epub 2004 Jan 19.Proc Natl Acad Sci U S A. 2004.PMID: 14732680Free PMC article.