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- W2317758056 abstract "Heterogeneous nuclear RNA and polyribosomal messenger RNA are both complexed with specific sets of proteins in the cell, forming ribonucleoprotein complexes known as hnRNP and mRNP, respectively. In the present investigation, the nucleoprotein structures of globin mRNA sequences in hnRNP and mRNP were probed by digestion with nuclease, under conditions in which RNA-protein rearrangements were shown not to occur. Mild digestion with pancreatic RNAase of a Friend erythroleukemia cell RNP fraction containing both hnRNP and mRNP resulted in a preferential depletion of globin mRNA-homologous sequences, as measured by hybridization of the surviving RNA with globin complementary DNA. Hypersensitivity to nuclease typifies 65% of the globin mRNA-homologous sequences, with the other 35% remaining relatively nuclease-resistant. Removal of polyribosomal mRNP by release with EDTA, followed by re-isolation of hnRNP on a sucrose gradient eliminated the nuclease-hypersensitive class of globin mRNA sequences in favor of the relatively nuclease-resistant class. These results suggest that mRNA sequences are more nuclease-sensitive in polyribosomal mRNP than they are in nuclear hnRNP particles. The implication is that mRNA sequences undergo a significant change in RNP structure at some point during their movement from nucleus to cytoplasm." @default.
- W2317758056 created "2016-06-24" @default.
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- W2317758056 date "1981-08-01" @default.
- W2317758056 modified "2023-09-30" @default.
- W2317758056 title "Ribonucleoprotein organization of eukaryotic RNA" @default.
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- W2317758056 doi "https://doi.org/10.1016/0022-2836(81)90377-6" @default.
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