Definition of Semiquinone. Meaning of Semiquinone. Synonyms of Semiquinone

Here you will find one or more explanations in English for the word Semiquinone. Also in the bottom left of the page several parts of wikipedia pages related to the word Semiquinone and, of course, Semiquinone synonyms and on the right images related to the word Semiquinone.

Definition of Semiquinone

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Meaning of Semiquinone from wikipedia

- Semiquinones (or ubisemiquinones, if their origin is ubiquinone) are free radicals resulting from the removal of one hydrogen atom with its electron during...
- exist in four redox states, which are the flavin-N(5)-oxide, quinone, semiquinone, and hydroquinone. FAD is converted between these states by accepting...
- neutral (semiquinone) state, and colourless when totally reduced. The oxidized and reduced forms are in fast equilibrium with the semiquinone (radical)...
- three redox states, fully oxidized (ubiquinone), partially reduced (semiquinone or ubisemiquinone), and fully reduced (ubiquinol). The redox functions...
- protein' and to the bL heme. This oxidation reaction produces a transient semiquinone before complete oxidation to ubiquinone, which then leaves the Qo site...
- catalytic cycle, a reversible interconversion of the oxidized (FMN), semiquinone (FMNH•), and reduced (FMNH2) forms occurs in the various oxidoreductases...
- protons. In the first step, a short-lived semiquinone intermediate is formed. In the second step, the semiquinone is reduced into a quinone dianion. 9,10-Anthraquinone-2...
- first ubiquinol (now oxidised to ubiquinone) is released, whilst the semiquinone remains bound. Round 2: A second ubiquinol is bound by cytochrome b....
- convert to the semiquinone radical. At pH = 7, this conversion occurs at 100 mV:[citation needed] C6H4(OH)2 → C6H4(O)(OH) + ½ H2 The semiquinone radical can...
- electron results in the free-radical (semiquinone) form of Q, and transfer of the second electron reduces the semiquinone form to the ubiquinol form, QH2....