FIG. 6.

Reduction of 2,5-DMBQ and 4,5-DMBQ by G. trabeum. The curves show results obtained in four separate incubations: increase in 2,5-DMHQ and decrease in 2,5-DMBQ in the presence of desferrioxamine (○), increase in 2,5-DMHQ and decrease in 2,5-DMBQ in the absence of desferrioxamine (▿), increase in 4,5-DMC and decrease in 4,5-DMBQ in the presence of desferrioxamine (□), and increase in 4,5-DMC and decrease in 4,5-DMBQ in the absence of desferrioxamine (▵). This experiment was repeated with different mycelial mats and gave essentially the same results (data not shown).