Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Reprinted from the Journal of Molecular Biology, 38, Francis Crick, "The Origin of the Genetic Code," 367-379, Copyright 1968, with permission from Elsevier. and http://www.sciencedirect.com/
Periodical. Crick, Francis. "The Origin of the Genetic Code." Journal of Molecular Biology 38, (1968): 367-379. Article. 13 Images.. Journal of Molecular Biology