Vitamins - VITAMIN E Vitamin E has 8 different structures...

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VITAMIN E Vitamin E has 8 different structures called vitamers found in both plants and animals. These vitamers fall into 2 classes, the tocopherols and the tocotrienols. The tocopherols have a saturated side chain (no double bonds) and the tocotrienols have unsaturated side chains (3 double bonds). Tocopherols and tocotrienols are further classified into four structures: alpha, beta, gamma, and delta. Alpha-tocopherol is the most common form of vitamin E and has the greatest biological activity. Alpha -tocotrienol and beta-tocopherol have approximately 30-40% of the biological activity of alpha tocopherol. The activity of the other tocopherols and tocotrienols are biologically insignificant. R 1 R 2 R 2 ALPHA ( α ) CH 3 CH 3 CH 3 BETA ( β ) CH 3 H CH 3 GAMMA ( γ ) H CH 3 CH 3 DELTA ( δ ) H H CH 3_
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The term vitamin A refers to retinol (an alcohol) and retinal (the aldehyde). The third form of vitamin A, retinoic acid, is a metabolite of retinal. All three have different functions in the
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This note was uploaded on 07/20/2010 for the course NUT NUT111AV taught by Professor Mcdonald during the Spring '09 term at UC Davis.

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Vitamins - VITAMIN E Vitamin E has 8 different structures...

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