pyrimidine

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Related to pyrimidine bases: Purine nucleotides

pyrimidine

 [pĭ-rim´ĭ-dēn]
an organic compound that is the fundamental form of the pyrimidine bases, which include cytosine, thymine, and uracil.

py·rim·i·dine (Pyr),

(pī-rim'i-dēn),
1,3-Diazine; a heterocyclic substance, the formal parent of several "bases" present in nucleic acids (uracil, thymine, cytosine) as well as of the barbiturates.

pyrimidine

/py·rim·i·dine/ (pĭ-rim´ĭ-dēn) an organic compound, C4H4N2, the fundamental form of the pyrimidine bases, including uracil, cytosine, and thymine.

pyrimidine

(pī-rĭm′ĭ-dēn′, pĭ-)
n.
1. A single-ringed, crystalline organic base, C4H4N2, that is the parent compound of a large group of biologically important compounds.
2. Any of a group of substituted derivatives of pyrimidine, including the nitrogen bases uracil, cytosine, and thymine, which are components of nucleic acids. Barbiturates and certain other drugs are also pyrimidines.

pyrimidine

[pərim′ədēn]
an organic compound of heterocyclic nitrogen found in nucleic acids and in many drugs, including the antiviral drugs acyclovir, ribavirin, and trifluridine.

py·rim·i·dine

(pir-im'i-dēn)
A heterocyclic substance, the formal parent of several "bases" present in nucleic acids (uracil, thymine, cytosine) as well as of the barbiturates.

pyrimidine

A nitrogenous base compound. Two pyrimidines, cytosine and thymine, are the DNA bases which, with two PURINES, form the genetic code. A third pyrimidine, uracil, takes the place of thymine in RNA.

pyrimidine

one of three types of bases found in NUCLEIC ACIDS, with a single ring structure. DNA contains CYTOSINE and THYMINE, RNA contains cytosine and URACIL. Pyrimidines always pair with PURINES in DNA.

pyrimidine

an organic compound that is the fundamental form of the pyrimidine bases, including uracil, cytosine and thymine.

A pyrimidine
cytosine.
References in periodicals archive ?
Nevertheless, the specific transition of m/z 132 [right arrow] 115 for 5,6-dihydrouracil allows the identification of all pyrimidine bases and their degradation products within one analytical run of 15 min.
Patients with a DHP deficiency accumulate DHT and DHU and exhibit slightly increased concentrations of the pyrimidine bases.
14]C]Thymine was catabolized by human liver to radiolabeled dihydrothymine, N-carbamyl-[beta]-aminoisobutyric acid, and [beta]-aminoisobutyric acid, showing the presence of all three active enzymes--DPD, dihydropyrimidinase, and [beta]-ureidopropionase--of the catabolic pathway of the pyrimidine bases.