cytosine

cy·to·sine

C0847600 (sī′tə-sēn′)n. Abbr. C A pyrimidine base, C₄H₅N₃O, that is the constituent of DNA and RNA involved in base-pairing with guanine.

[cyt(o)- + (rib)os(e) + -ine.]

cytosine

(ˈsaɪtəsɪn) n (Biochemistry) a white crystalline pyrimidine occurring in nucleic acids; 6-amino-2-hydroxy pyrimidine. Formula: C4H5N3O. See also DNA, RNA

cy•to•sine

(ˈsaɪ təˌsin, -ˌzin, -sɪn)

n. a pyrimidine base, C₄H₅N₃O, that is one of the fundamental components of DNA and RNA, in which it forms a base pair with guanine. Symbol: C [< German Cytosin (1894); see cyto-, -ose², -ine²]

cy·to·sine

(sī′tə-sēn′) A base that is a component of DNA and RNA, forming a base pair with guanine.

Thesaurus

Noun

cytosine - a base found in DNA and RNA and derived from pyrimidine; pairs with guanineCdeoxyribonucleic acid, desoxyribonucleic acid, DNA - (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information; "DNA is the king of molecules"ribonucleic acid, RNA - (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell; "ribonucleic acid is the genetic material of some viruses"pyrimidine - any of several basic compounds derived from pyrimidine

Translations

cytosine

enUK

cytosine

(sī`tōsēn'), organic base of the pyrimidinepyrimidine
, type of organic base found in certain coenzymes and in the nucleic acids of plant and animal tissue. The three major pyrimidines of almost universal distribution in living systems are cytosine, thymine, and uracil.
..... Click the link for more information. family. It was isolated from the nucleic acidnucleic acid,
any of a group of organic substances found in the chromosomes of living cells and viruses that play a central role in the storage and replication of hereditary information and in the expression of this information through protein synthesis.
..... Click the link for more information. of calf thymus tissue in 1894. A suggested structure for cytosine, published in 1903, was confirmed in the same year when that base was synthesized in the laboratory. Combined with the sugar ribose in glycosidic linkage, cytosine forms a derivative called cytidine (a nucleoside), which in turn can be phosphorylated with from one to three phosphoric acid groups, yielding the three nucleotidesnucleotide
, organic substance that serves as a monomer in forming nucleic acids. Nucleotides consist of either a purine or a pyrimidine base, a ribose or deoxyribose, and a phosphate group. Adenosine triphosphate serves as the principle energy carrier for the cell's reactions.
..... Click the link for more information. CMP (cytidine monophosphate), CDP (cytidine diphosphate), and CTP (cytidine triphosphate). Analogous nucleosides and nucleotides are formed from cytosine and deoxyribose. The nucleoside derivatives of cytosine perform important functions in cellular metabolism. CTP acts as a coenzymecoenzyme
, any one of a group of relatively small organic molecules required for the catalytic function of certain enzymes. A coenzyme may either be attached by covalent bonds to a particular enzyme or exist freely in solution, but in either case it participates intimately in
..... Click the link for more information. in both carbohydrate and lipid metabolism; it can readily donate one of its phosphate groups to adenosine diphosphate (ADP) to form adenosine triphosphateadenosine triphosphate
(ATP) , organic compound composed of adenine, the sugar ribose, and three phosphate groups. ATP serves as the major energy source within the cell to drive a number of biological processes such as photosynthesis, muscle contraction, and the synthesis of
..... Click the link for more information. (ATP), an extremely important intermediate in the transfer of chemical energy in living systems. CTP is the source of the cytidine found in ribonucleic acid (RNA) and deoxycytidine triphosphate (dCTP) is the source of the deoxycytidine in deoxyribonucleic acid (DNA). Thus cytosine is intimately involved in the preservation and transfer of genetic information.

Cytosine

(also 2-hydroxy-6-aminopyrimidine), a natural organic compound. A pyrimidine base, cytosine occurs as white crystals or thin, lustrous platelets. Its molecular weight is 111.1. It is found in all living cells as a component of nucleotides—that is, compounds that form nucleic acids, coenzymes, and certain other biologically active substances. The nucleoside cytidine consists of cytosine and the carbohydrate D-ribose.

cytosine

[′sīd·ə‚sēn] (biochemistry) C₄H₅ON₃ A pyrimidine occurring as a fundamental unit or base of nucleic acids.

cytosine

[si´to-sēn] a pyrimidine base found in nucleic acids.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.

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

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cytosine

cy•to•sine

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cytosine

Cytosine

cytosine

cytosine

cytosine

cy·to·sine (Cyt),

cytosine

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cytosine (C)

cytosine

Synonyms for cytosine

noun a base found in DNA and RNA and derived from pyrimidine

Synonyms

Related Words