Guanine

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Guanine is one of the five main nucleobases found in nucleic acids (e.g., DNA and RNA). Guanine is a purine derivative, and in Watson-Crick base pairing forms three hydrogen bonds with cytosine. Guanine "stacks" vertically with the other nucleobases via aromatic interactions. Guanine is a tautomer (see keto-enol tautomerism). The guanine nucleoside is called guanosine.

Related Topics:
Nucleobase - Nucleic acid - DNA - RNA - Purine - Watson-Crick base pairing - Hydrogen bond - Cytosine - Aromatic - Keto-enol tautomerism - Nucleoside - Guanosine

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Guanine is also the name of a white amorphous substance found in the scales of certain fishes, the guano of sea-birds, and the liver and pancreas of mammals. In fact, the name of the nucleobase is derived from the term 'guano', because it was first isolated from bird manure.

Related Topics:
Guano - Sea-bird - Liver - Pancreas - Mammal - Bird - Manure

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