Replication of Sindbis virus. I. Relative size and genetic content of 26 s and 49 s RNA |
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Authors: | D T Simmons J H Strauss |
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Institution: | Division of Biology, California Institute of Technology Pasadena, Calif., 91109, U.S.A. |
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Abstract: | The genome of Sindbis virus, 49 s RNA, is a single, intact polynucleotide chain having a molecular weight of 4.3±0.3 × 106 daltons. This has been determined using a variety of methods including polyacrylamide gel electrophoresis, sedimentation after reaction with formaldehyde, determination of the molecular weights of the double-stranded forms of Sindbis-specific RNA and hybridization competition. The second major species of single-stranded RNA made after infection with Sindbis, 26 s RNA, has been found to have a molecular weight of 1.6 × 106 daltons as determined by sedimentation in dimethylsulfoxide. Hybridizationcompetition experiments carried out between these two species of RNA, using double-stranded forms of Sindbis RNA isolated from infected cells, showed that 26 s RNA contains only one-third of the base sequences in 49 s RNA and thus represents a unique fraction of the viral genome. |
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Keywords: | TEMED N N N′ N′-tetramethylethylenediamine |
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