Purine: bicyclic ring structure consisting of fused imidazole and pyrimidine rings, with nitrogen atoms at the 1,3,7, and 9 positions; the basic structure of adenine, guanine, and other biologically important bases.
Source: CRISP
Purine: A series of heterocyclic compounds that are variously substituted in nature and are known also as purine bases. They include ADENINE and GUANINE, constituents of nucleic acids, as well as many alkaloids such as CAFFEINE and THEOPHYLLINE. Uric acid is the metabolic end product of purine metabolism.
Source: MeSH 2007
Source - MeSH 2007
Source - CRISP
Source - MeSH 2007
Source - CRISP
The following list attempts to classify Purine into categories where each line is subset of the next.
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