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. 1971 Sep;107(3):593–598. doi: 10.1128/jb.107.3.593-598.1971

Deoxyribonucleic Acid-Dependent Ribonucleic Acid Polymerase Activity in Purified Trachoma Elementary Bodies: Effect of Sodium Chloride on Ribonucleic Acid Transcription

Israel Sarov 1, Yechiel Becker 1
PMCID: PMC246976  PMID: 5095283

Abstract

Highly purified trachoma elementary bodies (T′ang strain), incubated in the presence of the four nucleoside triphosphates [Mg2+, Mn2+, 2-mercaptoethanol, tris(hydroxymethyl)aminomethane buffer (pH 7.5)] were found to incorporate 3H-uridine triphosphate (UTP) into ribonucleic acid (RNA) molecules. Eighty-seven per cent of the labeled molecules were sensitive to ribonuclease treatment. In vitro RNA synthesis was almost completely inhibited by actinomycin D. Rifampin was also inhibitory, but allowed some initial RNA synthesis before complete inhibition occurred. When the reaction mixture lacked Mn2+, trachoma elementary bodies synthesized, for a limited period, high-molecular-weight RNA species (23 to 24S, 16 to 17S, and 10 to 11S). Addition of 0.2 m NaCl to the same reaction mixture stimulated and prolonged 3H-UTP incorporation into the same radioactive RNA species. Addition of 0.001 m Mn2+ instead of NaCl also stimulated 3H-UTP incorporation but prevented the synthesis of the high-molecular-weight RNA species.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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