I Profile of complex III (averaged IBAQ values) in wild-type (+/+, solid line) and Uqcrh-/- (-/-, dashed line) heart tissue. J Profile of complexes III (red), I (yellow) and IV (green) to visualise and assess supercomplex composition and stability in wild-type (+/+, solid line) and Uqcrh-/- (-/-, dashed line) heart tissue. 