Table 2.

Kinetic parameters of acetylcholinesterase inhibition by extracts of R. officinalis.

Inhibitor	Concentration (µM; µg/mL)	Km (µM)	V max
Galanthamine	0	2.14 ± 0.13	0.38 ± 0.09
	2	5.47 ± 0.17	0.29 ± 0.06
	5	9.76 ± 0.25	0.21 ± 0.07
	10	17.38 ± 0.33	0.15 ± 0.05
Ethyl-acetate	50	4.21 ± 0.28	0.32 ± 0.08
	100	7.19 ± 0.41	0.28 ± 0.10
	150	8.28 ± 0.63	0.23 ± 0.08
Ethanol	50	3.05 ± 0.21	0.35 ± 0.05
	100	4.65 ± 0.12	0.30 ± 0.06
	150	6.24 ± 0.53	0.28 ± 0.08
Aqueous	50	2.50 ± 0.09	0.34 ± 0.09
	100	3.67 ± 0.11	0.31 ± 0.04
	150	4.22 ± 0.29	0.27 ± 0.07