Before revision: PPi + APS → ATP + Sulfate (catalyzed by ATP-sulfurylase) ATP + luciferin + O2 → AMP + PPi + oxyluciferin + CO2 + (hv ) (catalyzed by luciferase) where APS is adenosine 5-phosphosulfate .
After revision: PPi + APS → ATP + Sulfate (catalyzed by ATP-sulfurylase) ATP + luciferin + O2 → AMP + PPi + oxyluciferin + CO2 + hv (catalyzed by luciferase) ;where: PPi is pyrophosphate APS is adenosine 5-phosphosulfate The process can be represented by the following equations:;