1.3.3.12 FAD enzyme contains a covalently bound flavin 1.3.3.12 FAD the covalently bound flavin is 8alpha-[N(1)histidyl]FAD 1.3.3.12 FAD non-covalently bound FAD as redox-active cofactor, FAD-binding domain sequence of TcGAL and comparison to related aldonolactone oxidoreductases, overview 1.3.3.12 FMN dependent on non-covalently-bound FMN