Fig. 2.

Catalase-dependent growth of the two acI strains. a and b The effect of various concentrations (0–20 U mL⁻¹) of catalase on the growth of strains IMCC25003 (a) and IMCC26103 (b). c-f The effect of catalase addition on cell densities (c and d) and H₂O₂ concentrations (e and f) during cultivation of strains IMCC25003 (c and e) and IMCC26103 (d and f). Catalase (10 U mL⁻¹) was added to the culture media at day 0 (‘Catalase’) or days indicated by black arrows (‘1^st spike’ and ‘2^nd spike’). No catalase was added to the cultures designated as ‘Control’. All experiments were performed in triplicate using the culture medium FAMV+CM+AA (Table S1). Error bars indicate standard deviation. Note that error bars shorter than the size of the symbols are hidden