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. 2016 Jun 9;121(1):299–311. doi: 10.1152/japplphysiol.01077.2015

Fig. 3.

Fig. 3.

Enzyme activities in muscle tissue homogenates from gluteus medius and triceps brachii from young and aged American Quarter Horses. A: activity of citrate synthase (CS) per milligram tissue of gluteus medius and triceps brachii from young (n = 24 for gluteus, n = 11 for triceps) and aged (n = 9 for gluteus, n = 10 for triceps) horses. B–E: activity of cytochrome-c oxidase (COX; B and C) and 3-hydroxyacyl-CoA dehydrogenase (3-HADH; D and E) normalized to milligram tissue (B and D) and to CS activity (C and E) in gluteus medius and triceps brachii from young (n = 23–24 for gluteus, n = 11–12 for triceps) and aged (n = 9–10 for gluteus, n = 9–10 for triceps) horses. Values are means ± SE. Open bars represent young horses; solid bars, aged horses. Young vs. aged: *P < 0.05, **P < 0.01, ***P < 0.001. Gluteus vs. triceps: §P < 0.05, §§§P < 0.001.