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. 1979 Aug 10;6(11):3685–3701. doi: 10.1093/nar/6.11.3685

Sequential Sepharose chromatographic isolation of polysomes and polysomal RNAs depleted in nuclear RNA from Xenopus.

R E Swiderski, S A Johnson, B A Larkins, D E Graham
PMCID: PMC327966  PMID: 493118

Abstract

Analyses of sequence complexities, stage specific gene expression, and mRNA sequence divergence require polysomal RNA preparations relatively free of nuclear RNA contamination. Conventional procedures for the isolation of uncontaminated polysomal RNAs which rely on sucrose density centrifugations are laborious and unsuitable for large scale isolations. We describe here a method using sequential Sepharose chromatography for isolating polysomes and polysomal RNAs depleted for nuclear RNA. Polysomes and polysomal RNAs isolated from livers of Xenopus stimulated to produce vitellogenin were capable of directing protein synthesis in vitro and showed little evidence of degradation. The polysomal RNAs contained less than 0.5% of nuclear RNA.

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Selected References

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