Oxidoreductases;
Acting on single donors with incorporation of molecular oxygen (oxygenases);
With incorporation of one atom of oxygen (internal monooxygenases or internal mixed-function oxidases)
A luciferase from dinoflagellates such as Gonyaulax polyedra, Lingulodinium polyedrum, Noctiluca scintillans, and Pyrocystis lunula. It is a single protein with three luciferase domains. The luciferin is strongly bound by a luciferin binding protein above a pH of 7.