7.2.1.1 2,5-dibromo-3-methyl-6-isopropyl-4-benzoquinone a known inhibitor of the bc1 and b6f complexes found in mitochondria and chloroplasts, also inhibits quinone reduction by the Na+-NQR in a mixed inhibition mode. It does not just act as a simple competitor or redox mediator at the quinol oxidase site, but also as an antagonist to ubiquinone, inducing a redox bypass of the respiratory chain. The compound both acts as an inhibitor and as an alternative substrate of the Na+-NQR of Vibrio cholerae by a specific interaction with the NqrA subunit of the complex 56515 7.2.1.1 2-heptyl-4-hydroxyquinoline - 49716 7.2.1.1 2-heptyl-4-hydroxyquinoline N-oxide - 2007 7.2.1.1 2-n-heptyl-4-hydroxyquinoline N-oxide inhibited by micromolar concentrations. In contrast to the corresponding enzymes from Vibrio harveyi and Klebsiella pneumoniae, the enzyme from Azotobacter vinelandii is resistant to low 2-n-heptyl-4-hydroxyquinoline N-oxide concentrations 2812 7.2.1.1 2-n-heptyl-4-hydroxyquinoline N-oxide - 2812 7.2.1.1 2-n-heptyl-4-hydroxyquinoline N-oxide submicromolar concentrations inhibit 2812 7.2.1.1 2-n-heptyl-4-hydroxyquinoline-N-oxide - 2602 7.2.1.1 3-[(2E,6E)-8-hydroxy-3,7-dimethylocta-2,6-dien-1-yl]-2-methylquinolin-4(1H)-one 2-azido-5-iodobenzoate - 220838 7.2.1.1 5-azido-3-[(2E,6E)-8-hydroxy-3,7-dimethylocta-2,6-dien-1-yl]-2-methylquinolin-4(1H)-one 4-iodobenzoate - 220837 7.2.1.1 Ag+ - 75