3-deoxy-alpha-D-manno-oct-2-ulosonate + O2 => 3,8-dideoxy-8-oxo-alpha-D-manno-octulosonate + H2O2
3-deoxy-alpha-d-manno-oct-2-ulosonate + o2 => 3,8-dideoxy-8-oxo-alpha-d-manno-octulosonate + h2o2
3-deoxy-alpha-D-manno-oct-2-ulosonate + O2 => 3,8-dideoxy-8-oxo-alpha-D-manno-octulosonate + H2O2
3-deoxy-alpha-d-manno-oct-2-ulosonate + o2 => 3,8-dideoxy-8-oxo-alpha-d-manno-octulosonate + h2o2