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Nucleic Acids Res. 1981 December 11; 9(23): 6221–6229.
PMCID: PMC327599

Mononucleotide and dinucleotide frequencies, and codon usage in poliovirion RNA.

Abstract

The polio type 1 (Mahoney) RNA sequence (1) has been analyzed in terms of the distribution of its mononucleotides, dinucleotides and trinucleotides (codons). The distribution of adenosine in the sequence is nonuniform, being lower at the 5' end and higher at the 3' end. The dinucleotide CG is relatively rare and the dinucleotides UG and CA are relatively more common than expected. Codon usage is decidedly nonrandom. Codons containing CG are avoided and those ending in adenosine are favored. The asymmetric use of mononucleotides, dinucleotides and codons in polio RNA is unexplained at the present time although the lowered CG frequency may be the result of a DNA origin for polio RNA.

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Selected References

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Articles from Nucleic Acids Research are provided here courtesy of Oxford University Press