D-maltoheptaose + O2 <=> D-maltoheptaono-1,5-lactone + H2O2
d-maltoheptaose + o2 <=> d-maltoheptaono-1,5-lactone + h2o2
D-maltoheptaose + O2 <=> D-maltoheptaono-1,5-lactone + H2O2
d-maltoheptaose + o2 <=> d-maltoheptaono-1,5-lactone + h2o2