Alignment of the reductase of MSAMO, MsmD, with its homologues. MmoC(mc), sMMO of M. capsulatus Bath (53); MmoC(mt), sMMO of M. trichosporium OB3b (10); BenC, benzoate dioxygenase (40); CarAd, carbazole dioxygenase (48); TbuC, toluene-3-monooxygenase (9); TmoF, toluene-4-monooxygenase (56); DmpP, phenol hydroxylase (42); DsoF, DMS monooxygenase (25); AmoD, alkene monooxygenase (45); XylZ, xylene monooxygenase (21); NahAa, naphthalene dioxygenase (52). The numbering refers to the amino acid sequence of MsmD.