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.
Chu S, Archer RH, Zengel JM, Lindahl L.Chu S, et al. Among authors: archer rh.Proc Natl Acad Sci U S A. 1994 Jan 18;91(2):659-63. doi: 10.1073/pnas.91.2.659.Proc Natl Acad Sci U S A. 1994.PMID: 8290578Free PMC article.
Freedman LP, Zengel JM, Archer RH, Lindahl L.Freedman LP, et al. Among authors: archer rh.Proc Natl Acad Sci U S A. 1987 Sep;84(18):6516-20. doi: 10.1073/pnas.84.18.6516.Proc Natl Acad Sci U S A. 1987.PMID: 2442760Free PMC article.