| Literature DB >> 9066257 |
Abstract
Ribonucleotide reduction was essential for the transition from RNA to DNA by supplying deoxyribonucleotide precursors. The reaction requires free radical chemistry. Three quite different classes of ribonucleotide reductases are known today. All three are proteins containing a stable free radical amino acid, but each uses a different mechanism for its generation. Did they evolve from a common ancestor, with the arrival of atmospheric oxygen providing the driving force for their divergence, or was each a separate evolutionary invention?Entities:
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Year: 1997 PMID: 9066257 DOI: 10.1016/s0968-0004(97)01003-7
Source DB: PubMed Journal: Trends Biochem Sci ISSN: 0968-0004 Impact factor: 13.807