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Lactate utilization (A), excreted propionate (B), acetate (C), pyruvate (D), succinate (E), and intracellular vitamin B12 and pseudo-B12 (F; vitamin B12 – solid line, pseudo-B12 – dashed line) of PFR DSM 20271 during cultivation under aerobic (green) and anaerobic (orange) fermentations performed in bioreactors. N = 3, except pseudo-B12 samples III and IV: n = 2. No pseudo-B12 was detected under aerobic growth conditions.
