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Tocotrienols are named by analogy to tocopherols (from Greek words meaning to bear a pregnancy (see tocopherol); but with this word changed to include the chemical difference that tocotrienols are trienes, meaning that they share identical structure with the tocopherols except for the addition of the three double bonds to their side chains.
The four tocotrienols (in order of decreasing methylation: d-α-, d-β-, d-γ-, and d-δ-tocotrienol) have structures corresponding to the four tocopherols, except with an unsaturated bond in each of the three isoprene units that form the hydrocarbon tail, whereas tocopherols have a saturated phytyl tail (the phytyl tail of tocopherols gives ...
The binding site for RRR-α-tocopherol is a hydrophobic pocket with a lower affinity for beta-, gamma-, or delta-tocopherols, or for the stereoisomers with an S configuration at the chiral 2 site. Tocotrienols are also a poor fit because the double bonds in the phytic tail create a rigid configuration that is a mismatch with the α-TTP pocket. [14]
α-Tocopherol (alpha-tocopherol) is a type of vitamin E.Its E number is "E307". Vitamin E exists in eight different forms, four tocopherols and four tocotrienols.All feature a chromane ring, with a hydroxyl group that can donate a hydrogen atom to reduce free radicals and a hydrophobic side chain, along with an aromatic ring is situated near the carbonyls in the fatty acyl chains of the ...
γ-Tocotrienol is one of the four types of tocotrienol, a type of vitamin E. [ 1 ] [ 2 ] Vitamin E exists in nature in eight forms, each of which consists of a head section joined to either a saturated ( phytyl ) or an unsaturated ( farnesyl ) tail.
CYP4F2 is the only known enzyme to ω-hydroxylate tocotrienols and tocopherols which are forms of vitamin E, thus making it a key regulator of circulating plasma vitamin E levels. [ 74 ] [ 55 ] [ 75 ] It catalyzes ω-hydroxylation of the phytyl chain of tocopherols, with preference for γ-tocopherols over α-tocopherols , thus promoting ...
α-Tocotrienol is a form of tocotrienol and one of the chemical compounds that is considered vitamin E. See also. β-Tocotrienol; γ-Tocotrienol; δ-Tocotrienol;
δ-Tocopherol (delta-tocopherol) is a tocopherol and one of the chemical compounds that is considered vitamin E. As a food additive, it has E number E309. [2] See also
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