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.
Chen PT, Chao YP.Chen PT, et al. Among authors: chao yp.Biotechnol Lett. 2006 Oct;28(19):1595-600. doi: 10.1007/s10529-006-9126-3. Epub 2006 Aug 2.Biotechnol Lett. 2006.PMID: 16937250