Table 3.

Effect of Added Fe²⁺ on Relative Conversion of 3-Hydroxypropyl Glucosinolate to the Corresponding Nitrile (4-Hydroxybutyl Nitrile) by Arabidopsis ESP Expressed in E. coli ^a

Fe2+ Concentration (mM)	Arabidopsis ESP	Untransformed E. coli
0	32	0
0.1	106	10
0.5	100	79

^a Assays were performed as in Table 2. The rate of nitrile formation at 0.5 mM Fe²⁺ (72 nmol per 30-min assay per resuspended pellet from 180 mL of bacterial culture) was set to 100.