Evidence has been presented' for the accumulation of a double-stranded replicative form of MS2 RNA in vivo, following infection of Escherichia coli with MS2 phage, and for the identity of this material with the double-stranded RNA which is labeled in vitro with radioactive carbon2 on incubation of CL4-labeled ribonucleoside triphosphates with RNA synthetase.3 The present paper is concerned with...

Amphibian eggs and embryos as well as mammalian cells have been reported to contain an activity that unwinds double-stranded RNA. We have now found that adenosine residues have been modified in the RNA products of this unwinding activity. Although the modified RNA remains double-stranded, the modification causes the RNA to be susceptible to single-strand-specific RNase and to migrate as a retar...

The deoxyribonucleic acid (DNA) polymerase(s) of Rous sarcoma virus synthesizes two principal products-single-stranded DNA in the form of a DNA:ribonucleic acid (RNA) hybrid and double-stranded DNA. All of the single-stranded product and 50% of the double-stranded product can be hybridized to 70S viral RNA. These results, in combination with data obtained by analysis of the kinetics of double-s...

A rapid and simple method for the isolation and purification of dsRNA is presented. The crucial step of this method is the extraction of proteins and DNA with acid phenol. After the extraction, only RNA is left in the aqueous phase. ssRNA contamination of the RNA preparation can be greatly reduced when ammonium sulfate is present during the extraction.

Abstract DNA-RNA hybrid structures have been detected at the vicinity of DNA double-strand breaks (DSBs) occurring within transcriptional active regions genome. The induction hybrids strongly affects repair these DSBs, but nature and how they are formed remain poorly understood. Here we provide evidence that R loops, three-stranded containing displaced single-stranded (ssDNA) can form sub-telom...