Abstract

The quantitative changes of double-stranded RNA components of nuclear ribonucleo-protein particles containing pre-mRNA was investigated in the course of incubation of particles at 37 degrees C. The incubation of purified nuclear particles revealed the fragmentation of long double-stranded RNA sequences into shorter stretches. The presence of nuclear sap in the incubation mixture resulted in degradation of the double-stranded RNAs into acid soluble products. Autodegradation and/or ribonuclease treatment of nuclear RNP particles is accompanied by quantitative changes in the minor protein constituents of informofer.

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