Research Article

Enzyme Inhibition by Molluscicidal Components of Myristica fragrans Houtt. in the Nervous Tissue of Snail Lymnaea acuminata

Table 3

Kinetic constants ( and ) of different enzyme inhibitions by trimyristin (0.09 mM) and myristicin (0.03 mM) in snail Lymnaea acuminata.
(a) Michaelis-Menten constant and of different enzymes were calculated from Lineweaver-Burk Plots (1/V versus 1/S).

EnzymesUntreated (Control)Treated (Trimyristin)Treated (Myristicin)

AChE3.1 × 10-41.25.5 × 10-41.03.8 × 10-40.95
ACP1.3 × 10-550.01.0 × 10-538.42.1 × 10-550.00
ALP2.0 × 10-562.52.2 × 10-555.51.6 × 10-550.00

(b) Michaelis-Menten constant and of different enzymes were calculated from nonlinear regression (V versus S).

EnzymesUntreated (Control)Treated (Trimyristin)Treated (Myristicin)

AChE2.9 × 10-41.14.9 × 10-40.843.2 × 10-40.80
ACP0.9 × 10-5400.8 × 10-5331.9 × 10-546
ALP1.8 × 10-5561.3 × 10-5451.3 × 10-547