View your list of saved words. (You can log in using Facebook.)
Organic compound of the purine family, often called a base, consisting of two rings, each containing both nitrogen and carbon atoms, and an amino group. It occurs free in tea and in combined form in nucleic acids, ATP, vitamin B, and several coenzymes. In DNA its complementary base is thymine. It or its corresponding nucleoside or nucleotide may be prepared from nucleic acids by selective techniques of hydrolysis.
This entry comes from Encyclopædia Britannica Concise. For the full entry on adenine, visit Britannica.com.