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.
Green R, Szostak JW, Benner SA, Rich A, Usman N.Green R, et al. Among authors: szostak jw.Nucleic Acids Res. 1991 Aug 11;19(15):4161-6. doi: 10.1093/nar/19.15.4161.Nucleic Acids Res. 1991.PMID: 1714564Free PMC article.
Heuberger BD, Pal A, Del Frate F, Topkar VV, Szostak JW.Heuberger BD, et al. Among authors: szostak jw.J Am Chem Soc. 2015 Feb 25;137(7):2769-75. doi: 10.1021/jacs.5b00445. Epub 2015 Feb 16.J Am Chem Soc. 2015.PMID: 25654265Free PMC article.