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|Section2= |Section3= }} Pteridine is an aromatic chemical compound composed of fused pyrimidine and pyrazine rings. A pteridine is also a group of heterocyclic compounds containing a wide variety of substitutions on this structure. Pterins and flavins are classes of substituted pteridines that have important biological activity. Pteridine is a precursor in the synthesis of dihydrofolic acid in many microorganisms. Pteridine and 4-Aminobenzoic acid convert by the enzyme dihydropteroate synthetase into dihydrofolic acid in the presence of glutamate. The enzyme dihydropteroate synthetase is inhibited by Sulfonamide antibiotics ==See Also== * dihydrobiopterin * tetrahydrobiopterin 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「pteridine」の詳細全文を読む スポンサード リンク
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