Enzyme Kinetics simulates the classical lock-and-key model of enzymatic reactions. By varying concentration, rate of dissocation and rate of catalysis, students can observe enzyme-substrate behavior for a simple enzymatic reaction. Using the model's plot features, students can run an enzyme assay and plot a Michaelis-Menten curve and study enzyme kinetics.
For detailed instructions on using the program, take a look at the info window from the Enzyme Kinetics model.
Click on one of the pictures to see a quicktime movie of the model: