Chemical structure of guanine, showing its double-ring purine structure and the functional groups involved in hydrogen bonding with cytosine. (Image: Public Domain) Guanine has the chemical formula ...

Cytosine can also be isolated from DNA or RNA through enzymatic digestion and chromatographic purification techniques. In DNA, cytosine pairs with guanine through three hydrogen bonds, forming a ...

The guanine residues form hydrogen bonds with the guanidinium groups of ... bond from the 4-amino group of one of the methylated cytosine residues, further contributing to sequence selectivity.

Biogenic guanine crystals are fascinating structures found in various organisms, known for their remarkable optical properties that contribute to coloration and visual effects. These crystals are ...