- 9-β-d-Ribosylguanine (guanine combined through its N-9 with the C-1 of β-d-ribose); a major constituent of RNA and of guanine nucleotides. SYN: 9-β-d-ribofuranosylguanine.- cyclic g. 3′,5′-monophosphate (cGMP) an analog of cAMP; a second messenger for atrial natriuretic factor. SYN: cyclic GMP.
* * *gua·no·sine 'gwän-ə-.sēn n a nucleoside C10H13N5O5 composed of guanine and ribose
* * *n.a compound containing guanine and the sugar ribose. See also nucleotide.
* * *gua·no·sine (gwahґno-sēn) a purine nucleoside, guanine linked by its N9 nitrogen to the C1 carbon of ribose. It is a component of ribonucleic acid and its nucleotides play important roles in metabolism. Symbol G.
Medical dictionary. 2011.