has part has part characteristic of inheres in has modifier purine Abnormal circulating purine concentration Decreased circulating purine concentration 2008-03-18T06:32:00Z Decreased purine level Decreased purine levels HP:0004369 Abnormally reduced concentration of a purine compound. Purine compounds are aromatic heterocyclic compounds containing a purine moiety, which is formed a pyrimidine-ring ring fused to an imidazole ring. UMLS:C4025331 abnormal decreased amount