4-aminobutanoate + formaldehyde + H2O2 => 4-(methylamino)butanoate + O2 + H2O
4-aminobutanoate + formaldehyde + h2o2 => 4-(methylamino)butanoate + o2 + h2o
4-aminobutanoate + formaldehyde + H2O2 => 4-(methylamino)butanoate + O2 + H2O
4-aminobutanoate + formaldehyde + h2o2 => 4-(methylamino)butanoate + o2 + h2o