TABLE 2.

Effect of SOD and diaphorase on extent of semiquinone autoxidation^a

Amt of semiquinone produced (nmol)	% Autoxidation of:
	MBQ·−			DBQ·−
	Control	With SOD	With diaphorase	Control	With SOD	With diaphorase
50	5.2	43.6		28.0	45.1
100	4.5	30.6	13.8	19.6	40.0	39.9
200	3.5	24.0	14.7	14.0	37.0	41.7
300	2.3	18.6		12.1	37.2
400	2.0	15.4	13.1	10.5	34.6	40.5
500	1.7	12.4		9.6	33.9

^aThe extent of semiquinone autoxidation was calculated from H₂O₂ levels shown in Fig. 2 (control and SOD columns) and Fig. 3 (diaphorase column), taking into account the stoichiometry of the O₂^·− dismutation reaction and the amount of semiquinone produced by laccase during the entire reactions.