1.14.16.6 2-amino-4-hydroxy-6,7-dimethyl-tetrahydropteridine - 288333 1.14.16.6 2-amino-4-hydroxy-6,7-dimethyl-tetrahydropteridine pteridine cofactor required, 2-amino-4-hydroxy-6,7-dimethyl-tetrahydropteridine is most effective, optimal concentration is 0.000025 mM 639294 1.14.16.6 tetrahydrofolic acid pteridine cofactor required, 50% of the activity of 2-amino-4-hydroxy-6,7-dimethyl-tetrahydropteridine 639294 1.14.16.6 tetrahydropteridine required 639293