English: Reaction progress kinetic analysis can distinguish a) uninhibited catalysis b) product inhibition, and c) irreversible catalyst death by a series of same excess experiments. Lack of overlay between rate vs. substrate concentration for multiple trials of the same reaction with the same excess but different initial concentrations is indicative of product inhibition or catalyst death. The two may be distinguished where overlay of same excess experiments with added product is indicative of product inhibition, where lack of overlay is indicative of an alternative form of catalyst death. These plots were generated from arbitrary kinetic parameters utilizing CopasiUI kinetic modeling software.