a. Lactobacillus panis PM1 was cultured in mMRS under aerobic conditions, and samples for cell growth and enzyme assays withdrawn from the cultures after 24 hours. b. Values represent specific activities (unit/mg protein). One unit is defined as one micromole of H2O2 generated (for NADH oxidase) or decomposed (for NADH peroxidase) per minute. NADH oxidase and NADH peroxidase assays were carried out under aerated and non-aerated conditions, respectively.