puriiniset
Puriiniset are a family of heterocyclic aromatic compounds with a fused imidazole-pyrimidine ring system. In biology the most important purines are adenine and guanine, which serve as the two bases in DNA and RNA. When linked to a sugar, they form nucleosides (adenosine, guanosine); when those are phosphorylated they give nucleotides (AMP, ADP, ATP, GMP, GDP, GTP). Purine derivatives include widely used alkaloids and drugs such as caffeine, theobromine, and many purine analogs used in medicine.
Purine metabolism comprises two major pathways: de novo biosynthesis and salvage. De novo synthesis builds the
Purines are essential for genetic information storage and transmission, as well as cellular energy and signaling.
Clinical relevance includes disorders of purine metabolism and their treatment. Gout results from excess uric acid;