Guanine is an organic base of the purine family. When guanine attaches to the sugar ribose to form a glycosidic linkage, guanine forms its derivative guanosine. Guanosine is involved with the direct preservation and transfer of chemical energy in living systems. Guanosine is present in every cell in the human body.
Guanosine is a purine, meaning that it is a single ring structure. A carbon sugar ring attaches to nitrogen in the base to form an N-glycosylic bond. The nitrogenous bases, which are primarily nonpolar, pack tightly enough to exclude water and form a stable, primarily nonpolar environment in the helix interior.
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Common molecules
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Obtained courtesy of the Cambridge Structural Database
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