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.
Choi S, Murphy WL.Choi S, et al. Among authors: murphy wl.Biotechnol J. 2013 Apr;8(4):496-501. doi: 10.1002/biot.201200204. Epub 2013 Mar 7.Biotechnol J. 2013.PMID: 23420758Free PMC article.