Instances:
1.5.3.1 -- sarcosine oxidase (formaldehyde-forming)

1.5.3.2 -- N-methyl-L-amino-acid oxidase

1.5.3.4 -- N⁶-methyl-lysine oxidase

1.5.3.5 -- (S)-6-hydroxynicotine oxidase

1.5.3.6 -- (R)-6-hydroxynicotine oxidase

1.5.3.7 -- L-pipecolate oxidase

1.5.3.10 -- dimethylglycine oxidase

1.5.3.12 -- dihydrobenzophenanthridine oxidase

1.5.3.13 -- N¹-acetylpolyamine oxidase

1.5.3.14 -- polyamine oxidase (propane-1,3-diamine-forming)

1.5.3.15 -- N⁸-acetylspermidine oxidase (propane-1,3-diamine-forming)

1.5.3.16 -- spermine oxidase

1.5.3.17 -- non-specific polyamine oxidase

1.5.3.18 -- L-saccharopine oxidase

1.5.3.19 -- 4-methylaminobutanoate oxidase (formaldehyde-forming)

1.5.3.20 -- N-alkylglycine oxidase

1.5.3.21 -- 4-methylaminobutanoate oxidase (methylamine-forming)

1.5.3.22 -- coenzyme F₄₂₀H₂ oxidase

1.5.3.23 -- glyphosate oxidoreductase

1.5.3.24 -- sarcosine oxidase (5,10-methylenetetrahydrofolate-forming)

1.5.3.25 -- fructosyl amine oxidase (glucosone-forming)

1.5.3.26 -- fructosyl amine oxidase (fructosamine-forming)

1.5.3.o -- 2-(methylaminoethyl)phosphonate oxidase

Unofficial Reactions:
β-carotene + 2 a plastoquinone + H₂O → echinenone + 2 a plastoquinol,
fumiquinazoline A + dioxygen → fumiquinazoline C + hydrogen peroxide,
N-methyl-L-proline + dioxygen + H₂O → L-proline + formaldehyde + hydrogen peroxide

Enzymes and Genes:
N-methyl-L-proline N-demethylase: hpbA ( Paracoccus denitrificans PD1222 )
N-methy-L-proline N-demethylase: stcD ( Sinorhizobium meliloti 1021 )
fumiquinazoline C oxidase: Af12070 ( Aspergillus fumigatus )
β-carotene 4-monoketolase: crtO ( Synechocystis sp. PCC 6803 )