Fig. 5From: Highly efficient production of Clostridium cellulolyticum H10 d-psicose 3-epimerase in Bacillus subtilis and use of these cells to produce d-psicoseEffects of trace metal ions on cell growth and DPEase activity. DCW (black), DPEase activity (gray). All metal ions were tested at 1 mM concentration. Error bars represent the standard deviation of measurements performed in triplicateBack to article page