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From Biology-Online Dictionary | Biology-Online Dictionary
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A purine nucleoside that has guanine bound to a ribose sugar.


Guanosine may become guanosine monophosphate (GMP), guanosine diphosphate (GDP) or guanosine triphosphate (GTP) through phosphorylation.

Word origin: guano- from guanine + ribo- from ribose + -ine.

Molecular formula: C10H13N5O5

Synonym: guanine riboside.
Compare: deoxyguanosine.
See also: nucleoside.