title: Biopterin. V. De novo synthesis of dihydrobiopterin: evidence for its quinonoid structure and lack of dependence of its reduction to tetrahydrobiopterin on dihydrofolate reductase.
mesh_terms: D000818:Animals; D001708:Biopterins / Q000031:analogs & derivatives / Q000378:metabolism*; D001921:Brain / Q000378:metabolism*; D002849:Chromatography, Gas; D011621:Pteridines / Q000378:metabolism*; D011809:Quinones; D051381:Rats; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013762:Tetrahydrofolate Dehydrogenase / Q000378:metabolism*; D014018:Tissue Distribution
chemical_list: D011621:Pteridines; D011809:Quinones; D001708:Biopterins; C017226:7,8-dihydrobiopterin; D013762:Tetrahydrofolate Dehydrogenase; C003402:sapropterin