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.
Lee S, Owen KE, Choi HK, Lee H, Lu G, Wengler G, Brown DT, Rossmann MG, Kuhn RJ.Lee S, et al. Among authors: kuhn rj.Structure. 1996 May 15;4(5):531-41. doi: 10.1016/s0969-2126(96)00059-7.Structure. 1996.PMID: 8736552Free article.