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What (who) is pyrimidine - definition
CHEMICAL COMPOUND
Pyrimidines; Pyramidine; Pyrimidine nucleotides; Pyrimidine nucleosides; Pyrimidyl; Pyrimidin; Tetrahydropyrimidine; Pyrimidine nucleoside; Pyrimidine-nucleoside; Meta-diazine
![The pyrimidine nitrogen bases found in [[DNA]] and [[RNA]].](https://commons.wikimedia.org/wiki/Special:FilePath/Blausen 0324 DNA Pyrimidines.png?width=200 "The pyrimidine nitrogen bases found in [[DNA]] and [[RNA]].")
pyrimidine
[p?'r?m?di:n]
¦ noun Chemistry a colourless crystalline heterocyclic compound with basic properties.
?(also pyrimidine base) a substituted derivative of this forming one of the two classes of base present in DNA and RNA, including cytosine, thymine, and uracil.
Origin
Pyrimidine dimer
TYPE OF DNA DAMAGE
Thymine dimer; Cyclobutyl dimer; Thymine dimers; Thymine dimerization; Direct DNA damage; Cyclobutane pyrimidine dimer; Pyridimine dimer; Cyclobutane thymine dimerization; Pyrimidine dimers; Cytosine dimer
Pyrimidine dimers are molecular lesions formed from thymine or cytosine bases in DNA via photochemical reactions,
Pyrimidine-nucleoside phosphorylase
CLASS OF ENZYMES
EC 2.4.2.2; Pyrimidine-nucleoside:phosphate alpha-D-ribosyltransferase
In enzymology, a pyrimidine-nucleoside phosphorylase () is an enzyme that catalyzes the chemical reaction
Wikipedia
Pyrimidine
Pyrimidine (C4H4N2; ) is an aromatic, heterocyclic, organic compound similar to pyridine (C5H5N). One of the three diazines (six-membered heterocyclics with two nitrogen atoms in the ring), it has nitrogen atoms at positions 1 and 3 in the ring.: 250 The other diazines are pyrazine (nitrogen atoms at the 1 and 4 positions) and pyridazine (nitrogen atoms at the 1 and 2 positions).
In nucleic acids, three types of nucleobases are pyrimidine derivatives: cytosine (C), thymine (T), and uracil (U).
