Wiktionary
purines
n. (plural of purine English)
Usage examples of "purines".
Results of cyanogen and nitrile polymerization, including imidazole, purines, pyrimidines.
Science had long known that organic chemistry would come up with the same amino acids, the same purines and pyrimidines under a wide variety of circumstances.
Neither DNA nor RNA has appeared, but the building blocks of these large molecules, called purines and pyrimidines, have.