Fig 4. Individual electron transport chain complex enzyme activities among MSTN genotype (CC/II, CT/IN, TT/NN) horses.

NADH-ubiquinone oxidoreductase (Complex I), Succinate dehydrogenase (Complex II), Decylubiquinol cytochrome c oxidoreductase (Complex III) and Cytochrome c oxidase (Complex IV) (A-D, respectively) activities were measured spectrophotometrically in whole skeletal muscle homogenates (CC/II: n = 20, CT/IN: n = 15 and TT/NN: n = 8), performed in at least duplicate. Results presented with mean ± SEM, p-values where shown indicate significance as measured by a one-way ANOVA with a Bonferroni multiple comparison post-test.