N-acetyl-D-galactosamine + O2 = N-acetyl-D-galactosamino-1,5-lactone + H2O2
n-acetyl-d-galactosamine + o2 = n-acetyl-d-galactosamino-1,5-lactone + h2o2
N-acetyl-D-galactosamine + O2 = N-acetyl-D-galactosamino-1,5-lactone + H2O2
n-acetyl-d-galactosamine + o2 = n-acetyl-d-galactosamino-1,5-lactone + h2o2