IUPAC Codes - Bioinformatics.Org

IUPAC nucleotide code, Base. A, Adenine. C, Cytosine. G, Guanine. T (or U), Thymine (or Uracil). R, A or G. Y, C or T. S, G or C. W, A or T. K, G or T. M, A or C.

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