cytosine


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cytosine

 [si´to-sēn]
cytosine arabinoside cytarabine.

cy·to·sine (Cyt),

(sī'tō-sēn),
A pyrimidine found in nucleic acids.

cytosine

/cy·to·sine/ (si´to-sēn) a pyrimidine base occurring in animal and plant cells, usually condensed with ribose or deoxyribose to form the nucleosides cytidine and deoxycytidine, major constituents of nucleic acids. Symbol C.
cytosine arabinoside  cytarabine.

cytosine

(sī′tə-sēn′)
n. Abbr. C
A pyrimidine base, C4H5N3O, that is the constituent of DNA and RNA involved in base-pairing with guanine.

cytosine (C)

[sī′təsin]
a pyrimidine base that is a component of DNA and RNA. In free or uncombined form it occurs in trace amounts in most cells, usually as a product of the enzymatic hydrolysis of nucleic acids and nucleotides. On hydrolysis, it is converted to urea and ammonia. See also thymine, uracil.

cy·to·sine

(Cyt) (sī'tō-sēn)
A pyrimidine found in nucleic acids.

cytosine

A pyrimidine base, one of those forming the genetic code of DNA and RNA.
Cytosineclick for a larger image
Fig. 128 Cytosine . Molecular structure.

cytosine (C)

one of four types of nitrogenous bases found in DNA, having the single-ring structure of a class known as PYRIMIDINES. Cytosine forms part of a DNA unit called a NUCLEOTIDE and always forms complementary pairs with a DNA purine base called a GUANINE. Cytosine also occurs in RNA molecules.

cytosine

a pyrimidine base found in the nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

cytosine arabinoside
References in periodicals archive ?
Cytosine is converted to uracil, most probably at the nucleotide or nucleoside stage [15].
In the index patient (IV-8) of this MCKD family, the MUC1 -VNTR single cytosine insertion was detected in 7/96 clones in the first screening [Figure 2]c.
Patterns of DNA cytosine methylation between hybrids and their parents in sorghum genome.
Screening Aspergillus Species for Cytosine Deaminase Activity
A new pattern of cytosine arabinoside induced lung toxicity.
Bi-sulfite treatment leaves 5methylcytosine intact, but modifies cytosine (denoted as C) to a uracil analogue.
When bound to cytosine, the methyl group sticks out.
5% + %, thymine 99 + %, and cytosine 99 + % were purchased from Acros Organics.
The RNA molecule is usually a single strand that folds into different shapes and consists of base units (adenine, guanine, cytosine, and uracil) bonded together with the sugar ribose.
Comparisons of the sequences of the four bases--adenine, cytosine, guanine and thymine--are used to identify genetic differences among living creatures from bacteria to humans.
Methylation of cytosine in DNA is an epigenetic mark that is important for genome stability, transcriptional regulation of endogenous genes, and permanent silencing of transposable elements and viral sequences.
They contain hydrocyanic acid, the alkaloid cytosine and toxic saponins.