TABLE 7.

Activities of different fusion proteins for meso-epoxides

Enzyme	Parameter value for indicated substrate
	cis-2,3-Epoxybutane (substrate 20)			Cyclohexene oxide (substrate 23)
	Activity (μmol min−1 mg−1)	eep (%)	E valued	Activity (μmol min−1 mg−1)	eep (%)	E valued
AraEchAa	0.003	85 (2R,3R)	12	0.005	>99 (R,R)	>200
Bfueh1a	<0.002	—c	—	0.035	89 (S,S)	17
Corehb	<0.002	—	—	1.4	30 (R,R)	1.9
Npueh1b	<0.002	—	—	0.016	97 (S,S)	66
Rpaeh2a	0.019	58 (2R,3R)	3.8	<0.002	—	—

^aInitial activities were determined at a 2 mM substrate concentration with cell extracts.

^bActivities were measured with (partially) purified protein.

^c—, activity was too low to determine the enantiomeric excess of the product (ee_p).

^dThe E value was calculated from the ee_p according to equation 1.