7.1.1.8 additional information activity of enzyme complex III of the mitochondrial electron transport chain is essential for early heart muscle cell differentiation 7.1.1.8 additional information enzyme complex III is part of the mitochondrial membrane electron transport chain 7.1.1.8 additional information enzyme is a central component of cellular energy conservation machinery 7.1.1.8 additional information enzyme is part of the Knallgas reaction pathway 7.1.1.8 additional information the Qo-cycle, overview 7.1.1.8 additional information the enzyme is a component of the multienzyme complex III 7.1.1.8 additional information the physiological impact of a mixed Q pool in RQ-producing organisms, overview 7.1.1.8 additional information photosynthetic growth of purple non-sulfur bacteria such as Rhodobacter capsulatus depends on the cyclic electron transfer between the ubihydroquinone:cytochrome c oxidoreductases (cyt bc1 complex), and the photochemical reaction centers, mediated by either a membrane-bound or a freely diffusible electron carrier 7.1.1.8 additional information reaction mechanism of superoxide generation by bc1, overview 7.1.1.8 additional information reaction mechanism of superoxide generation by bc1, overview. Maximum superoxide anions generation activity is observed when the complex is inhibited by antimycin A or inactivated by heat treatment or proteinase K digestion. The protein subunits, at least those surrounding the QP pocket, may play a role either in preventing the release of superoxide. from its production site to aqueous environments or in preventing O2 from getting access to the hydrophobic QP pocket and might not directly participate in superoxide production