An oxidized tocopherol, formed from the isomeric 2-methyl-2-phytyl-6-chromenol with methyl groups in one or more of positions 5, 7, and 8, by migration of an H atom from 6-OH to C-4, which yields a 1,4-benzoquinone. Abbreviated TQ and preceded by α-, β-, etc., as in the tocopherols, to indicate degree of methylation. SYN: tocopherylquinone.

Medical dictionary. 2011.

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  • TQ — • tocopherolquinone; • tourniquet …   Dictionary of medical acronyms & abbreviations

  • TQ — Abbreviation for tocopherolquinone. * * * tocopherolquinone; tourniquet …   Medical dictionary

  • vitamin — vitaminic, adj. /vuy teuh min/; Brit. also /vit euh min/, n. any of a group of organic substances essential in small quantities to normal metabolism, found in minute amounts in natural foodstuffs or sometimes produced synthetically: deficiencies… …   Universalium

  • tocopherylquinone — SYN: tocopherolquinone …   Medical dictionary