Guanosine(redirected from guanosine triphosphate)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
the nucleoside consisting of the carbohydrate ribose and the nitrogen base guanine. Colorless crystals. Molecular weight, 283.26 and melting point. 235° C. Free guanosine is an intermediate product of metabolism. It is a component of nucleic acids and biologically active guanyl nucleotides, GMP, GDP. and GTP. GTP (guanosine triphosphate), an energy-rich phosphorus compound, is a coenzyme of some reactions, such as the amination of inosinic acid and the transference of amino acids to ribosomes during the biosynthesis of protein.