Structure of nuclear pre-mRNA. VIII. Isolation and characterization of complementary sequences

Ryskov, A.P.; Enikolopov, G.N.; Limborskaya, S.A.

Molekuliarnaia Biologiia 10(4): 748-755

1976


ISSN/ISBN: 0026-8984
PMID: 1023053
Document Number: 108554
After the annealing of pre-mRNA at high Cot values, up to 20% of the material becomes resistant to the action of ribonuclease. This has been attributed to the presence of self-complementary sequences (scRNA) in the pre-mRNA. The most important properties of scRNA, which was isolated in preparative amounts, have been studied. The approximate dimensions of the complementary segments are 45-50 nucleotides. Hybridization experiments have shown that scRNA is transcribed from repeated segments of the genome. It may be postulated that the rapidly hybridizing pre-mRNA fraction consists mainly of self-complementary sequences.

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