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. 1977 Jul;131(1):240–246. doi: 10.1128/jb.131.1.240-246.1977

Messenger ribonucleoprotein complexes isolated by oligodeoxythymidylate-cellulose chromatography from Neurospora crassa polysomes.

P E Mirkes
PMCID: PMC235415  PMID: 141447

Abstract

Messenger ribonucleoprotein (mRNP) complexes were isolated from ethylenediaminetetraacetic acid-dissociated polysomes of Neurospora crassa. Approximately 15% of the [3H]uridine incorporated into polysomal ribonucleic acid (RNA) during a 15-min pulse was eluted from oligodeoxythymidylate-cellulose as an mRNP complex. The isolated mRNP complexes exhibited sedimentation coefficients ranging from 15S to greater than 60S. RNA isolated from these mRNP complexes sedimented in sucrose gradients between 4S and 40S, with broad peaks at 15S and 24S. The buoyant density of mRNP complexes eluted with 25% formamide was 1.42 to 1.44 g/cm3, whereas for mRNP complexes eluted with 50% formamide it was 1.48 to 1.50 g/cm3. Six polypeptides, with molecular weights of 14,000, 19,000, 24,000, 31,000, 44,000, and 66,000, were associated with mRNP complexes eluted with 25% formamide. The mRNP complexes eluted with 50% formamide had one associated polypeptide, of molecular weight 27,000.

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Selected References

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