Main Page | See live article | Alphabetical index Guanosine is a molecule (known as a nucleoside) that is formed when guanine is attached to a ribose ring (also known as a ribofuranose) via a β-N9-glycosidic bond. Guanosine can be phosphorylated to become GDP (guanosine diphosphate) and GTP (guanosine triphosphate) among other things. If guanine is attached to a deoxyribose ring, it is known as a deoxyguanosine. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.