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. 1977 Jun;4(6):1739–1757. doi: 10.1093/nar/4.6.1739

Synthesis of messenger RNA-like molecules in isolated myeloma nuclei.

Y Y Mory, M L Gefter
PMCID: PMC342518  PMID: 561391

Abstract

Nuclei isolated from mouse myeloma cells grown in tissue culture are capable of synthesizing RNA for prolonged periods of time. Addition of cytoplasmic extracts to the system stimulates slightly the rate and prolongs the time of synthesis. As judges by sedimentation in SDS and in formamide gradients, the size of the RNA synthesized is heterogeneous from smaller than 10S to larger than 45S, thus resembling in vivo made RNA. The characteristics of some of the RNA are in keeping with those expected to be for mRNA. Fifty percent of the RNA synthesis is sensitive to alpha-amanitin. After an incubation of two hours in the absence of alpha-amanitin about 10 percent of the newly synthesized RNA is found outside of the nuclei; it sediments with a broad distribution at 18S. A considerable fraction of the RNA that is released from nuclei in vitro can promote the formation of polyribosomes, and contains molecules that are polyadenylated and "capped".

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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