Chemical structure of guanine, showing its double-ring purine ... Guanine is a component of several important biomolecules involved in energy metabolism, such as guanosine triphosphate (GTP) and ...

The purine structure consists of a pyrimidine ring (positions ... Guanine is also a component of important biomolecules such as GTP (guanosine triphosphate), which is involved in cellular signaling ...