In enzymology, a deoxyhypusine monooxygenase is an enzyme that catalyzes the chemical reaction protein N6--L-lysine + AH2 + O2 ⇌ {\displaystyle \rightleftharpoons } protein N6-[-4-amino-2-hydroxybutyl]-L-lysine + A + H2OThe 3 substrates of this enzyme are a protein-bound N6--L-lysine, an electron acceptor AH2, and O2, and its 3 products are protein-bound N6-[-4-amino-2-hydroxybutyl]-L-lysine, the reduction product A, and H2O. Wikipedia