A constituent of the unsaponifiable portion of animal tissue lipids (λmax. 272mμ.)

Nourishing and health benefits of coenzyme Q₁₀

“…In 1955, Festenstein et al (1955), the scientists in Morton's Laboratory in Liverpool (England) isolated an unsaponifiable lipid with a striking ultraviolet absorption at 272 nm from the intestinal mucosa of horses. Because the new substance was identified as a quinone and was found to be widely distributed in animal tissues, Morton named it ubiquinone (ubiquitous quinone -everywhere present quinone).…”

Coenzyme Q10 in health and disease

“…Festenstein et al (1955) named the substance ubiquinone, while Crane et al (1957) chose the name coenzyme Q.…”

Roles of Vitamins as Coenzymes

“…Detected in lipid extracts of mitochondria (Crane et al, 1957) and in the unsaponifiable portion of tissue from vitamin-A-deficient rats by its strong ultraviolet absorption at 275 nm (Festenstein et al, 1955;Morton, 1956), a quinone was given the name coenzyme Q (CoQ) when it was found to undergo reduction and reoxidation in mitochondria and to reactivate isooctane-extracted mitochondria for the oxidation of succinate . In the vitamin-A-deficiency study, it was given the name ubiquinone for its ubiquitous occurrence.…”