Thymine

Thymine
IUPAC name 5-Methylpyrimidine-2,4(1H,3H)-dione
Identifiers
3D model (JSmol)
ECHA InfoCard 100.000.560
MeSH Thymine
CompTox Dashboard (EPA)
SMILES
  • CC1=CNC(=O)NC1=O
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Thymine, or 5-methyluracil, is a pyrimidine base found in the nucleic acid DNA.

In RNA thymine is swapped for uracil to represent the same genetic information. In DNA, thymine (T) connects to adenine (A) by two hydrogen bonds. These pair bonds hold the two strands of the DNA double helix structure together.

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