Table 1. Effect of metal chelators, detergents, electron donors on the LmbB2 activity.

Additive	Concentration	Relative activity (%)
None	-	100
Chelator	(mM)
EDTA	0.1	83
	1.0	73
Detergent	(% w/v)
SDS	0.01	85
	0.02	71
Electron donors	(mM)
NADH*	2	75
NADPH	2	56
BH4 *	2	186
tetrahydrofolic acid	2	118

^*compounds were tested in concentrations ranging from 2 µm to 2 mM. The results were consistent with the conclusion that BH₄ and NADH increase and decrease, respectively, the LmbB2 activity.