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Table 2

Respiratory chain enzyme activities in S. cerevisiae and chicken liver.

Q2 Activity SD Inh. %
S. cerevisiae NADH 404 121 59
SDH 146 3 95
QCR 840 20 87
Chicken liver NADH 39 6 47
SDH 16 1 100
QCR 540 40 67

Activities [U] of individual enzymes are defined in Figure 2; Q2 – Coenzyme Q2 used as a substrate for activity measurement. NADH – NADH dehydrogenase; SDH – succinate dehydrogenase; QCR – cytochrome c reductase; SD – standard deviations; Inh. – the rate of inhibition with the corresponding inhibitor in %: NADH – DPI for S. cerevisiae which do not possess complex I and rotenone for chicken liver; SDH – sodium malonate and QCR – antimycin A.

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