1.5.1.30 flavin reductase
2.5.1.9 riboflavin synthase
2.5.1.9 riboflavin synthase
2.7.1.26 riboflavin kinase
2.7.1.42 riboflavin phosphotransferase
3.5.99.1 riboflavinase

1.12.1.2 hydrogen dehydrogenase
1.13.11.32 2-nitropropane dioxygenase
1.13.12.4 lactate 2-monooxygenase
1.14.12.7 phthalate 4,5-dioxygenase
1.14.12.8 4-sulfobenzoate 3,4-dioxygenase
1.14.14.3 alkanal monooxygenase (FMN-linked)
1.14.14.5 alkanesulfonate monooxygenase
1.14.99.24 steroid 9alpha-monooxygenase
1.16.8.1 cob(II)yrinic acid a,c-diamide reductase
1.1.2.3 L-lactate dehydrogenase (cytochrome)
1.1.3.15 (S)-2-hydroxy-acid oxidase
1.3.1.14 orotate reductase (NADH)
1.3.3.1 dihydroorotate oxidase
1.3.3.2 lathosterol oxidase
1.3.3.7 dihydrouracil oxidase
1.4.1.13 glutamate synthase (NADPH)
1.4.1.14 glutamate synthase (NADH)
1.4.3.5 pyridoxamine-phosphate oxidase
1.5.1.29 FMN reductase
1.5.8.1 dimethylamine dehydrogenase
1.5.99.1 sarcosine dehydrogenase
1.5.99.4 nicotine dehydrogenase
1.6.2.4 NADPH-hemoprotein reductase
1.6.99.1 NADPH dehydrogenase
1.7.1.1 nitrate reductase (NADH)
1.7.1.2 nitrate reductase [NAD(P)H]
1.7.3.5 3-aci-nitropropanoate oxidase
1.8.1.2 sulfite reductase (NADPH)
2.7.1.26 riboflavin kinase
2.7.1.42 riboflavin phosphotransferase
2.7.7.2 FMN adenylyltransferase
3.6.1.18 FAD diphosphatase