ubiquinoln.
/juːˈbɪkwᵻnɒl/, /juːbᵻˈkwɪnɒl/, U.S. /juˈbɪkwəˌnɔl/, /juˈbɪkwəˌnɑl/, /ˌjubəˈkwɪˌnɔl/, /ˌjubəˈkwɪˌnɑl/ Biochemistry.
A reduced form of ubiquinone which participates in electron-transfer reactions in cellular respiration and acts as an antioxidant, esp. in cellular membranes.Compared with ubiquinone, ubiquinol contains a 1,4-benzoquinol nucleus.
ΚΠ
1960 T. W. Goodwin Recent Adv. Biochem. (ed. 4) i. 23 The ‘α-tocopherol’ produced on reducing the mitochondrial extract with HCl/ascorbic acid was not α-tocopherol but reduced ubiquinone (ubiquinol).
1988 L. Stryer Biochem. (ed. 3) xvii. 403 Reduction of this enzyme-bound intermediate by a second electron yields ubiquinol.
2000 C. K. Sen et al. Handbk. Oxidants & Antioxidants in Exercise vii. xvii. 454 Its reduced form, ubiquinol, is believed to be an important antioxidant in protecting both mitochondrial and plasma membranes.
2015 Sunday Tel. (Nexis) 4 Jan. (Stella) 18 Most Q10 supplements contain a form called ubiquinone... Take a ubiquinol supplement instead.
This is a new entry (OED Third Edition, June 2015; most recently modified version published online March 2022).
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