Enzyme E.C number Substrate(s) References
4-Methyl 5-nitrocatechol monooxygenase 1.13.12.- 4-Methyl-5-nitrocatechol [58]
Toluene 3-monooxygenase   1.14.-.- 3-Hydroxytoluene, Toluene [59]
Toluene 2-monooxygenase 1.14.13.- 2-Hydroxytoluene, Toluene, 1,1,2-Trichloroethylene [60]
4-Hydroxyacetophenone monooxygenase 1.14.13.- 4-Hydroxyacetophenone [61]
Toluene 4-monooxygenase  1.14.13.- Toluene, N-Nitrosodimethylamine [62]
4-Hydroxybenzoate 3-monooxygenase 1.14.13.2 4-Hydroxybenzoate [63]
2-Mercaptobenzothiazole monooxygenase  1.14.-.- 2-Mercaptobenzothiazole  [64]
6-Hydroxy-2-mercaptobenzothiazole monooxygenase 1.14.-.- 6-Hydroxy-2-mercaptobenzothiazole  [64]
Benzothiazole monooxygenase 1.14.-.- Benzothiazole  [65]
Phenylboronic acid monooxygenase 1.14.-.- Phenylboronic acid  [66]
2,6-Dihydroxybenzothiazole monooxygenase 1.14.-.- 2,6-Dihydroxybenzothiazole  [67]
2-Hydroxybenzothiazole monooxygenase 1.14.-.- 2-Hydroxybenzothiazole  [65]
1-Indanone monooxygenase 1.14.-.- 1-Indanone   [68]
2-Indanone monooxygenase 1.14.-.- 2-Indanone  [68]
6-Hydroxy-3-methyl-2-oxo-1,2-dihydroquinoline 6-monooxygenase 1.14.-.- 6-Hydroxy-3-methyl-2-oxo-1,2-dihydroquinoline  [69]
Toluene-4-sulfonate monooxygenase 1.14.-.- Toluene 4-sulfonate  [70]
Dibenzothiophene 5,5-dioxide monooxygenase 1.14.13.- Dibenzothiophene-5,5-dioxide  [71]
3-Methyl 2-oxo 1,2-dihydroquinoline 6-monooxygenase 1.14.-.- 3-Methyl-2-oxo-1,2-dihydroquinoline  [69]
BCDS monooxygenase 1.14.-.- Branched-chain dodecylbenzene sulfonate  [72]
Toluene sulfonate methyl monooxygenase 1.14.13.- Toluene-4-sulfonate  [73]
Orcinol 2-monooxygenase 1.14.13.6 Orcinol  [74]
3-Hydroxybenzoate 4-hydroxylase 1.14.13.23 3-Hydroxybenzoate  [75]
3-Hydroxybenzoate 6-monooxygenase 1.14.13.24 3-Hydroxybenzoate  [76]
4-Methoxybenzoate monooxygenase 1.14.99.15 4-methoxybenzoate [77]
Benzoate 4-monooxygenase 1.14.13.12 Benzoate  [78]
N-isopropylacetaniline monooxygenase 1.14.15.- N-Isopropylacetanilide  [79]
Table 1: Monooxygen6+ases involved in the biodegradation of aromatic compounds.