Adenine, Guanine, and Purine
Adenine (left) and Guanine (center) are called purine bases because their ring structures are similar to those in Purine (right). These bases appear in both DNA and RNA.
Adenine (left) and Guanine (center) are called purine bases because their ring structures are similar to those in Purine (right). These bases appear in both DNA and RNA.