PMID: 699042Sep 1, 1978Paper

Low molecular weight RNAs hydrogen-bonded to nuclear and cytoplasmic poly(A)-terminated RNA from cultured Chinese hamster ovary cells

Cell
W R Jelinek, L Leinwand

Abstract

A group of RNAs 90--100 nucleotides long were isolated by melting them from poly(A)-terminated nuclear or cytoplasmic RNA from cultured Chinese hamster ovary cells. Conditions that favor hydrogen bond formation allowed the reassociation of these low molecular weight RNAs with poly(A)-terminated RNA. The nuclear poly(A)-terminated molecules contained 1.3 moles of the low molecular weight RNAs per mole of poly(A), while the cytoplasmic poly(A)-terminated RNA contained only one seventh as much. These low molecular weight RNAs were also isolated from the total 4S RNA of either the nucleus or cytoplasm by polyacrylamide gel electrophoresis. They formed a prominantly labeled band of RNA in the gels after cells had been labeled with H(3)32PO4 for 4 hr. The low molecular weight RNAs melted from the nuclear poly(A)-terminated RNA were slightly different (although not necessarily in primary nucleotide sequence) from those melted from the cytoplasmic poly(A)-terminated RNA.

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Citations

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