Purification of SV-40 messenger RNA by hybridization to SV-40 DNA covalently bound to Sepharose
- PMID: 170957
- DOI: 10.1021/bi00690a010
Purification of SV-40 messenger RNA by hybridization to SV-40 DNA covalently bound to Sepharose
Abstract
SV-40 DNA sheared form was coupled in a stable covalent bond to cyanogen bromide activated Sepharose. Under the conditions used at least 80% of the DNA was bound to Sepharose. The T 1/2 of hybridization of 0.5 mug/ml of SV-40 cRNA to SV-40 DNA-Sepharose was 1 hr. This rate of hybridization is sufficiently rapid to purify SV-40 sequences from solutions containing as little as 0.05-0.1 mug/ml. Nonspecific hybridization of RNA is in the range of 0.1-0.2% of the total input RNA. The DNA-Sepharose is fairly stable and can be reused several times to purify RNA. The SV-40 DNA-Sepharose was used to select large quantities of virus specific RNA from SV-40 infected BS-C-1 cells. The virus specific RNA when added to cell-free extracts from wheat germ was shown to direct the synthesis of the major viral structural protein VP-1.
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