Table 1.

The enzymatic activities of the bc1 and Cox complexes are affected in the double mutant CYT1-1 QCR9-1

Genotype	bc1 activity (%)	Cox activity (%)
WT	608  ± 61 (100)	1213  ± 67 (100)
CYT1-1	456  ± 51 (75)	1310  ± 62 (108)
QCR9-1	365  ± 55 (60)	1322  ± 50 (109)
CYT1-1 QCR9-1	109  ± 18 (18)	801  ± 23 (66)

WT (CW30); CYT1-1 (PHT2); QCR9-1 (PHT28); QCR9-1 CYT1-1 (CQ2-2B). Enzymatic activities were measured on mitochondria purified from galactose grown cells as described in Materials and Methods and in Fig. 4B. The ubiquinol cytochrome c oxido-reductase activity (bc1 activity) is expressed in nmol of reduced cytochrome c/min per mg of protein.