cytosine


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Related to cytosine: cytidine

cytosine

 [si´to-sēn]
cytosine arabinoside cytarabine.

cy·to·sine (Cyt),

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

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.

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.
References in periodicals archive ?
To differentiate a set of statistically significantly methylated cytosine sites against potential technical randomness due to incomplete bisulfite conversion, the p values for the methylation state of both the DNA and RNA methylation are calculated by Fisher's exact test against the background conversion odds after the filtering of the sites mapped to introns and secondary structures.
Frederick, "Cytosine-cytosine+ base pairing stabilizes dna quadruplexes and cytosine methylation greatly enhances the effect," Biochemistry, vol.
Because purine bases and cytosine are found in both RNA and DNA, the concentrations of purine and cytosine are higher than that of uracil [17].
To further confirm the cytosine methylation status at the EGFR c.2369 position, an independent sample cohort was tested by use of a different detection method, MS-HRM followed by pyrosequencing.
Although the migration time CV values for five consecutive runs were 0.26% for cytosine, 0.20% for methylcytosine, and 0.30% for guanosine, respectively, the tailing of the cytosine peak indicated the presence of a contaminating element comigrating with Cyt.
The activation of the immune system, by consequence, begins with the recognition of the microorganisms by the macrophages with an activation pathway of the TLR2 and TLR4, leading to the apparition of inflammatory cytosines with the consequent expression of RANKL for the osteoclasts activation and survival mechanisms [5, 19].
The results for Cytosine (C) agreed with that of Xia et al [25] and also for Cytosine (C), Thymine (T) and Adenine (A) with Xia et al [26] for samples of human plasma.
These data indicated that full methylation of internal cytosine occurred most frequently in all the four types at CCGG context in the maize genome.
Methylation of cytosine to 5-methylcytosine (5-mC) is a major epigenetic event which interferes with the binding of proteins to DNA resulting in the exquisite control of gene expression and cell differentiation.
The formation of excimers is important not only to understand the distinct photophysics of oligonucleotides and DNA but also to account for the intrinsic and distinct photoinduced reaction of cytosine and thymine, which form CPDs.
The genotypes B, C, D and E have thymine in nt 1858, F has cytosine or thymine and A generally has cytosine.