Guaninum
Guaninum vel guaninium est basis nucleici acidi ("nucleobasis") et simul unum basium quinque formationis acidorum nucleicorum ADN et ARN in organismis.

Natura guanini

Natura chemia 
Nomen IUPAC est 2-amino-1,9-dihydro-6H-purino-6-onum.

Natura physiologica 
Intra ADN, guanin nucleosidum deoxy-guanosinum vincula chemica tria cum basi cytosini format.

 ADN
 Cytosinum
 Morbus Huntington

Nexus externi 
 study.com de guanino. 

Nucleobases
Purina