adenin Definition

Adenine is a heterocyclic aromatic nitrogenous organic base important in biochemistry. It is one of the five main purine nucleobases used in forming nucleic acids, along with guanine, cytosine, thymine, and uracil. Adenine pairs with thymine in DNA (or uracil in RNA) and combines with ribose to form adenosine, which can then form adenosine monophosphate (AMP), an important component in various cellular processes.