How can just four nitrogenous bases--adenine, cytosine, guanine, and uracil--possibly code for all 20 amino acids? Thus, early researchers quickly determined that the smallest combination of As, Cs, ...
There are four bases: Adenine and Guanine (purines); Cytosine and Thymine (Pyrimidines). Purines have two carbon-nitrogen rings while pyrimidines have a single carbon-nitrogen ring. Thus, there are ...
Researchers at The Scripps Research Institute (TSRI) claim to have created the first stable semisynthetic organism with extra bases added to its genetic code. The single-celled organism is also able ...
Proceedings of the National Academy of Sciences of the United States of America, Vol. 77, No. 1, [Part 2: Biological Sciences] (Jan., 1980), pp. 186-190 (5 pages) In the filamentous blue-green alga ...
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