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Biochim Biophys Acta. 1984 Jun 16;782(2):127-31.

Nucleotide sequence of nuclear 5.4 S RNA of mouse cells.


The nucleotide sequence of nuclear 5.4 S RNA, a new species of small nuclear RNA (snRNA) of mouse cells, was determined. The 5.4 S RNA consists of 138 nucleotide residues containing 1 mol each of 2,2,7- trimethylguanosine (m3(2,2,7) G), 2'-O-methyladenosine (Am), 2'-O-methyluridine (Um) and pseudouridine as modified nucleosides. This RNA has a cap structure, m3(2,2,7) ++GpppAm -, at its 5'-terminus and sequences complementary to the terminal consensus sequences of introns. The sequence complementary to the 5'-splice junction, A-U-C-C-psi-U-A-C-C-U-G, is very similar to the 5'-terminal sequence of U1 RNA.

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