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guan·ine (Gua, G),(gwahn'ēn, -in),
2-Amino-6-oxypurine; one of the two major purines (the other being adenine) occurring in all nucleic acids.
guanine/gua·nine/ (gwah´nēn) a purine base, in animal and plant cells usually occurring condensed with ribose or deoxyribose to form guanosine and deoxyguanosine, constituents of nucleic acids. Symbol G.
n. Abbr. G
A purine base, C5H5ON5, that is an essential constituent of both RNA and DNA.
a purine 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 first converted into xanthine and finally into uric acid. See also adenine.
One of the two major purines (the other being adenine) occurring in all nucleic acids.
guanineOne of the two purine bases of double-ring structure (the other being ADENINE) which, with the PYRIMIDINE bases form the ‘rungs of the ladder’, and the genetic code, in the double helix deoxyribonucleic acid (DNA) molecule. Guanine is also one of the ribonucleic acid (RNA) bases.
guanine (G)one of four types of nitrogenous bases found in DNA, having the double-ring structure of a class known as PURINES. Guanine forms part of a DNA unit called a NUCLEOTIDE and always forms complementary pairs with a DNA pyrimidine base called CYTOSINE. Guanine also occurs in RNA molecules.
G; a purine base, one of the fundamental components of nucleic acids (DNA and RNA).