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.
Brown A, Snyder F.Brown A, et al. Among authors: snyder f.Methods Enzymol. 1992;209:377-84. doi: 10.1016/0076-6879(92)09046-6.Methods Enzymol. 1992.PMID: 1495418No abstract available.