Status	Description	Organism	Genes	References
	Trp repressor binding protein	Bacillus methylotrophicus	yhcB
	NADH-dependent flavin reductase	Burkholderia cepacia complex	Bcep18194_B2506
	FAD reductase	Escherichia coli	fre	[323]
	NADH-dependent flavin reductase	Sinorhizobium fredii	hpaC
	flavin reductase	Escherichia coli	hpaC	[323]