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ArticlesCopyright © 1980 by American Association for the Advancement of Science
Efficient metal-ion catalyzed template-directed oligonucleotide synthesis
The Pb2+ and Zn2+ ions are efficient catalysts for the polycytidylic acid-directed polymerization of an activated guanylic acid derivative, guanosine 5'-phosphorimidazolide. The products include oligomers of 30 to 40 units in length. The nucleotide residues are predominantly 2'-5' linked when Pb2+ is the catalyst, and predominantly 3'-5' linked in the presence of Zn2+. The significance of these results in the context of the prebiotic evolution of RNA polymerase is discussed.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)