1.5.1.33 0.05 - dihydrobiopterin in 50 mM HEPES buffer, pH 7.4, at 25°C 725417 1.5.1.33 0.12 - dihydrobiopterin pH 5.0, 25°C, recombinant enzyme 763844 1.5.1.33 0.22 - biopterin mutant enzyme Y175F 484954 1.5.1.33 0.23 - biopterin wild type enzyme 484954 1.5.1.33 0.43 - quinonoid 6,7-dimethyl-7,8-dihydropterin in 50 mM HEPES buffer, pH 7.4, at 25°C 725417 1.5.1.33 0.44 - quinonoid 6,7-dimethyl-7,8-dihydropterin in 50 mM HEPES buffer, pH 7.4, at 25°C 725417 1.5.1.33 0.54 - quinonoid dihydrobiopterin in 50 mM HEPES buffer, pH 7.4, at 25°C 725417 1.5.1.33 0.57 - dihydrobiopterin in 50 mM HEPES buffer, pH 7.4, at 25°C 725417 1.5.1.33 0.8 - 7,8-dihydromonapterin recombinant mutant R24A, pH 6.0, 25°C 765008 1.5.1.33 1.4 - 7,8-dihydromonapterin recombinant mutant Y161A, pH 6.0, 25°C 765008