1.11.1.1 additional information Npr is absolutely required for aerobic growth on glycerol and optimal growth on the other substrates 1.11.1.1 NAD+ + H2O - 1.11.1.1 NADH + H+ + H2O2 - 1.11.1.1 NADH + H+ + H2O2 four peroxidase isoenzymes are isolated, catalyse both H2O2-consuming and H2O2-producing activity 1.11.1.1 NADH + H2O2 - 1.11.1.1 NADH + H2O2 elimination of toxic H2O2, regeneration of oxidized pyridine nucleotide which is essential to the strictly fermentative metabolism