It pairs with cytosine (C) through three hydrogen bonds, providing stability to the DNA double helix. Guanine is also a component of important biomolecules such as GTP (guanosine triphosphate), which ...

cyclic guanosine monophosphate (cGMP), from breaking down into guanosine triphosphate. In humans, an abundance of cGMP allows the arteries to widen, which is why it can help people get and sustain ...