In enzymology, a Watasenia-luciferin 2-monooxygenase is an enzyme that catalyzes the chemical reaction Watasenia luciferin + O2 ⇌ {\displaystyle \rightleftharpoons } oxidized Watasenia luciferin + CO2 + hnuThus, the two substrates of this enzyme are Watasenia luciferin and O2, whereas its 3 products are oxidized Watasenia luciferin, CO2, and hn. Wikipedia