Robuta

https://en.wikipedia.org/wiki/Guanosine
guanosinewikipedia
https://www.rcsb.org/structure/1KIC
Inosine-adenosine-guanosine preferring nucleoside hydrolase from Trypanosoma vivax: Asp10Ala mutant in complex with inosine
rcsbpdbinosineadenosineguanosine
https://www.rcsb.org/structure/1LOV
X-ray structure of the E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate
x rayrcsbpdbstructuremutant