https://doi.org/10.1351/goldbook.N04254
The heterocyclic pyrimidine and purine compounds which are constituents of all @[email protected] Adenine (A), guanine (G) and cytosine (C) are found in both @[email protected] and @[email protected], thymine (T) is found (primarily) in @[email protected] and uracil (U) only in @[email protected]
Source:
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 147 [Terms] [Paper]