Thymine


Chemical name: 5-Methylpyrimidine-2,4(1H,3H)-dione
Chemical formula: C5H6N2O2
Molecular mass: 126.11 g/mol
Melting point 316 - 317 °C
CAS number 65-71-4
SMILES CC1=CNC(NC1=O)=O

Thymine, also known as 5-methyluracil, is a pyrimidine nucleobase. It is found in the nucleic acid DNA. In RNA thymine is replaced with uracil in most cases. In DNA, thymine(T) binds to adenine (A) via two hydrogen bonds to assist in stabilizing the nucleic acid structures.

Thymine combined with deoxyribose creates the nucleoside deoxythymidine, which is synonymous with the term thymidine. Thymidine can be phosphorylated with one, two or three phosphoric acid groups, creating respectively TMP, TDP or TTP (thymidine mono- di- or triphosphate).

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