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.
Periodical. Nathans, Daniel, and Fritz Lipmann. "Amino Acid Transfer from Aminoacyl-Ribonucleic Acids to Protein on Ribosomes of Escherichia Coli." Proceedings of the National Academy of Sciences of the United States of America 47, 4 ([15 April 1961]): 497-504. Article. 8 Images.. Proceedings of the National Academy of Sciences of the United States of America