• Source: Semiquinone

Semiquinones (or ubisemiquinones, if their origin is ubiquinone) are free radicals resulting from the removal of one hydrogen atom with its electron during the process of dehydrogenation of a hydroquinone, such as hydroquinone itself or catechol, to a quinone or alternatively the addition of a single hydrogen atom with its electron to a quinone. Semiquinones are highly unstable.
E.g. ubisemiquinone is the first of two stages in reducing the supplementary form of CoQ10 (ubiquinone) to its active form ubiquinol.




References

Kata Kunci Pencarian:

• Semiquinone
• Flavin adenine dinucleotide
• Flavin group
• Q cycle
• Ubiquinol
• Flavin mononucleotide
• Quinone
• Electron transport chain
• Catechol
• Coenzyme Q – cytochrome c reductase