Influence of luciferase concentration on initial light intensity in the
coupled reaction with Fre. Assays contained luciferase, 1 μm
oxidoreductase, 10 μm decanal, 10 μm NADPH, and 2
μm FMN. Reactions were initiated with the rapid injection of 1.0
ml of buffer. Measurements were recorded once steady state light emission was
reached, ∼5 s after injection. Data were fit to the Michaelis-Menten
equation as described (50).
This plot was generated with kaleidagraph (Synergy Software).