pyrimidine

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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 ?
The concentrations of C13:0, iso-C15:0, and C17:0 were significantly and positively linked with pyrimidine contents in rumen.
Some functionalized pyrimidine compounds have been used as Ca-channel blockers [10] and anti-hypertensive agents [11].
GC response after derivatization was examined after different time intervals and no change in response (average peak height/peak area, (n=4) was observed for the purines and pyrimidines investigated up to 18 h.
The variation of Density, Viscosity, Velocity, adiabatic compressibility (Pad), intermodular free length (Lf), relaxation time (X), free volume (Vf), internal pressure (ni), acoustical impedance (Z),constant (W), ultrasonic attenuation ([alpha]/f2), Rao's constant (R), molar volume (Vm), and cohesive energy (CE) of pyrimidine derivatives at 313 K in different concentrations are shown in Figures 1 to 13.
Free radical scavenging properties of pyrimidine derivative // Organic and Medicinal Chemistry Letters.
In 8 of 11 metabolite categories, median percentage differences in peak areas were <15%, although percentage differences were variable in certain categories, most notably, purines, pyrimidines, and derivatives.
Below are the methods for the preparation of each pyrimidine derivatives
The complementary pairing of purines and pyrimidines is accomplished by hydrogen bonding between H-O and H-N.
For the purines and pyrimidines mixture, the guanine and adenine oxidation peaks when compared with the isolated nitrogenated bases solution (see Table 2), are shifted toward more positive potentials, suggesting the formation of hybridization products.
Besides its inhibition of DHODH, teriflunomide is thought to possess several immunomodulatory effects in vitro and in vivo which are independent of pyrimidine synthesis.
It is not burned as fuel by the body, but is instead preserved for the work of synthesizing an important class of compounds in the body called purines and pyrimidines," he said.
The reaction is a light initiated cycloreversion of the cyclobutyl ring joining the two pyrimidines.