(2S,4S,5S)-2-amino-6-(3,4-dihydroxyphenyl)-4-hydroxy-5-(methylamino)hexanoyl-[peptidyl-carrier protein] + O2 <=> (2S,4S)-2-amino-4-[(3S)-7,8-dihydroxy-1,2,3,4-tetrahydroisoquinolin-3-yl]-4-hydroxybutanoyl-[peptidyl-carrier protein] + H2O2
(2s,4s,5s)-2-amino-6-(3,4-dihydroxyphenyl)-4-hydroxy-5-(methylamino)hexanoyl-[peptidyl-carrier protein] + o2 <=> (2s,4s)-2-amino-4-[(3s)-7,8-dihydroxy-1,2,3,4-tetrahydroisoquinolin-3-yl]-4-hydroxybutanoyl-[peptidyl-carrier protein] + h2o2