cytosine

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

/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.

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

see cytarabine.