TABLE 2.

Specific activities of the supercomplex enzymatic constituents

The activity of the three enzymes (embedded in the protein supercomplex) has been determined at 40 °C with spectrophotometric assays. Inhibitions were measured with antimycin A and KCN as described under “Experimental Procedures.”

	Specific activity	Inhibited specific activity	Inhibitor used
	μmol·min−1·mg−1
Sulfide quinone reductase	20 ± 3.2	5.00 ± 0.98	Antimycin A
bc1 complex	1.85 ± 0.36	0.49 ± 0.1	Antimycin A
Cytochrome c oxidase	1.34 ± 0.29	0	KCN