Thymine
Chemical compound of DNA / From Wikipedia, the free encyclopedia
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For the B vitamin whose name sounds and looks similar, see Thiamine.
Not to be confused with thymidine.
Thymine (/ˈθaɪmɪn/) (symbol T or Thy) is one of the four nucleobases in the nucleic acid of DNA that are represented by the letters G–C–A–T. The others are adenine, guanine, and cytosine. Thymine is also known as 5-methyluracil, a pyrimidine nucleobase. In RNA, thymine is replaced by the nucleobase uracil. Thymine was first isolated in 1893 by Albrecht Kossel and Albert Neumann from calf thymus glands, hence its name.[2]
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
5-Methylpyrimidine-2,4(1H,3H)-dione | |||
Other names
5-Methyluracil | |||
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ECHA InfoCard | 100.000.560 | ||
MeSH | Thymine | ||
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Properties | |||
C5H6N2O2 | |||
Molar mass | 126.115 g·mol−1 | ||
Density | 1.223 g cm−3 (calculated) | ||
Melting point | 316 to 317 °C (601 to 603 °F; 589 to 590 K) | ||
Boiling point | 335 °C (635 °F; 608 K) (decomposes) | ||
3.82 g/L[1] | |||
Acidity (pKa) | 9.7 | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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