Purines

Purines are bases found in the nucleosides and nucleotides that make up nucleic acids. In nucleic acids, the purines match up with specific pyrimidine bases. The matching between purines and pyrimidines forms "base-pairs" in which adenine pairs with thymine (in DNA) or uracil (in RNA). Guanine pairs with the base cytosine in either nucleic acid.

See also: Pyrimidines, DNA, RNA, Nucleosides, Nucleotides, 6-Mercaptopurine, Nucleic Acids

INTERNET LINK - Purine Metabolism