
n. (Abbr. T)
A pyrimidine base, C5H6N2O2, that is an essential constituent of DNA.
[thym(ic acid), acid obtained from the thymus + -INE2.]
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American Heritage Dictionary:
thy·mine |

[thym(ic acid), acid obtained from the thymus + -INE2.]
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Oxford Dictionary of Chemistry:
thymine |
A pyrimidine derivative and one of the major component bases of nucleotides and the nucleic acid DNA.

Britannica Concise Encyclopedia:
thymine |
For more information on thymine, visit Britannica.com.
Columbia Encyclopedia:
thymine |
McGraw-Hill Dictionary of Aviation:
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Oxford Dictionary of Biochemistry:
thymine |

| thymin, thymidylyl, thymidylic acid | |
| thymine deoxyriboside, thymine dimer, thymine riboside |
Random House Word Menu:
categories related to 'thymine' |

Wikipedia on Answers.com:
Thymine |
| Thymine | |
|---|---|
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5-Methylpyrimidine-2,4(1H,3H)-dione |
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Other names
5-methyluracil |
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| Identifiers | |
| CAS number | 65-71-4 |
| UNII | QR26YLT7LT |
| MeSH | Thymine |
| ChEMBL | CHEMBL993 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C5H6N2O2 |
| Molar mass | 126.11 g mol−1 |
| Density | 1.23 g cm−3 (calculated) |
| Melting point |
316-317 °C, 589-590 K, 601-603 °F |
| Boiling point |
335 °C, 608 K, 635 °F (decomposes) |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Thymine (T, 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. As the name suggests, thymine may be derived by methylation of uracil at the 5th carbon. In RNA, thymine is replaced with uracil in most cases. In DNA, thymine (T) binds to adenine (A) via two hydrogen bonds, thus 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).
One of the common mutations of DNA involves two adjacent thymines or cytosine, which, in presence of ultraviolet light, may form thymine dimers, causing "kinks" in the DNA molecule that inhibit normal function.
Thymine could also be a target for actions of 5-fluorouracil (5-FU) in cancer treatment. 5-FU can be a metabolic analog of thymine (in DNA synthesis) or uracil (in RNA synthesis). Substitution of this analog inhibits DNA synthesis in actively dividing cells.
Thymine bases are frequently oxidized to hydantoins over time after the death of an organism.[1]
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This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
| T | |
| thymidine | |
| T (abbreviation) |
| What are cytosine and thymine? Read answer... | |
| What are thymine and cytosine? Read answer... | |
| What does thymine mean? Read answer... |
| What is Cytosine and thymine? | |
| What is thymine used for? | |
| What are examples of thymine? |
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![]() | American Heritage Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read more |
![]() | Oxford Dictionary of Chemistry. A Dictionary of Chemistry. Sixth Edition. Copyright © Market House Books Ltd, 2008. All rights reserved. Read more | |
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![]() | McGraw-Hill Dictionary of Aviation. An Illustrated Dictionary of Aviation.. Copyright © 2005 by McGraw-Hill Companies, Inc. All rights reserved. Read more |
| Oxford Dictionary of Biochemistry. Oxford University Press. Oxford Dictionary of Biochemistry and Molecular Biology © 1997, 2000, 2006 All rights reserved. Read more | ||
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