malonaldehyde + O2 + H2O <=> 3-oxopropanoate + H2O2 + H(+)
malonaldehyde + o2 + h2o <=> 3-oxopropanoate + h2o2 + h(+)
malonaldehyde + O2 + H2O <=> 3-oxopropanoate + H2O2 + H(+)
malonaldehyde + o2 + h2o <=> 3-oxopropanoate + h2o2 + h(+)