SDHB and coronary artery disorder: As shown in Fig. 6, protein levels of NADH: Ubiquinone Oxidoreductase Subunit B8 (NDUFB8; complex I) (Fig. 6A), Succinate dehydrogenase [ubiquinone] iron-sulfur subunit (SDHB; complex II) (Fig. 6B), Ubiquinol-Cytochrome C Reductase Core Protein 2 (UQCRC2; complex III) (Fig. 6C), complex IV mitochondrial cytochrome c oxidase I (MT-CO1) (Fig. 6D) and mitochondrial ATP synthase 5 A (ATP5A; complex V) (Fig. 6E); all showed increased expressions in the CAD compared to the non-CAD LV lysates (N = 6, P < 0.05).