A white, crystalline, pyrimidine base, C5H6N2O2, contained in the nucleic acids of all tissues. It links with adenine in the DNA structure.

The DNA nucleotide thymine is also complemented by uracil in RNA.

structural formula of thymine:

          O        CH2
           \\     /
            C -- C
           /      \\
     H -- N        C -- H
           \      /
            C -- N
See also: adenine, guanine, cytosine, and uracil.

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