Supplementary Figure 6: Ubiquinones (UQ6) trapped in the catalytic Qi site of CIII.
From: Cryo-EM structure of the yeast respiratory supercomplex
a, Section of the CIII dimer from the supercomplex III2IV showing the rim of the quinone reduction (Qi site) cavity. The rim of the cavity is formed by four subunits of CIII, Qcr10, Qcr9, Rip1 and Cob. The UQ6 molecule in the catalytic site and the hemes (bH and bL) are highlighted in red and blue, respectively. b, Map density carved around the model of the two cytochrome b subunits of CIII, demonstrating the density of two ubiquinone molecules (UQ6), highlighted in blue. The UQ6 model is shown in yellow.
