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Time courses of decomposition of H2O2 by illuminated (solid lines) or darkened (dashed lines) cultures of catalase-peroxidase mutant (♦) or the double mutant KatTplΩ (□). At time zero, 15 μM (A), 30 μM (B), 50 μM (C), or 100 μM (D) H2O2 was added to the cultures.
