Melted ds RNA isolated from rabbit bone marrow pre-mRNA was hybridized with excess of globin mRNA which was prepared from rabbit reticulocytes. 7-9% of ds sequences became RNAase-stable and about 30% of the sequences could be bound to poly(U)-Sepharose through poly (A) of mRNA. The size of RNAase-stable hybrid is about 30 nucleotides, that is one fourth of the length of one strand of the ds RNA.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC343007PMC
http://dx.doi.org/10.1093/nar/3.6.1487DOI Listing

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