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Ascorbyl palmitate is an ester formed from ascorbic acid and palmitic acid creating a fat-soluble form of vitamin C. In addition to its use as a source of vitamin C , it is also used as an antioxidant food additive ( E number E304).
Most animals and plants are able to synthesize vitamin C through a sequence of enzyme-driven steps, which convert monosaccharides to vitamin C. Yeasts do not make l-ascorbic acid but rather its stereoisomer, erythorbic acid. [63] In plants, synthesis is accomplished through the conversion of mannose or galactose to ascorbic acid.
In humans, one analysis found it to make up 21–30% (molar) of human depot fat, [18] and it is a major, but highly variable, lipid component of human breast milk. [19] Palmitate negatively feeds back on acetyl-CoA carboxylase (ACC), which is responsible for converting acetyl-CoA to malonyl-CoA, which in turn is used to add to the growing acyl ...
These compounds are water-soluble and, thus, cannot protect fats from oxidation: For this purpose, the fat-soluble esters of ascorbic acid with long-chain fatty acids (ascorbyl palmitate or ascorbyl stearate) can be used as antioxidant food additives. Sodium-dependent active transport process enables absorption of Ascorbic acid from the intestine.
Ascorbate salts may be better tolerated by the human body than the corresponding weakly acidic ascorbic acid. Ascorbates are highly reactive antioxidants used as food preservatives. [2] Examples of mineral ascorbates are: Sodium ascorbate ; Calcium ascorbate ; Potassium ascorbate ; Magnesium ascorbate
Other acyl groups such as stearate (C18:0) or oleate (C18:1) are also frequently accepted, more so in plant and viral proteins, making S-acylation a more useful name. [8] [9] Several structures of the DHHC domain have been determined using X-ray crystallography. It contains a linearly-arranged catalytic triad of Asp153, His154, and Cys156.
There is a growing amount of research demonstrating that adding various vitamer antioxidants (eg; retinol, alpha tocopherol, gamma tocopherol, tocopheryl acetate, ascorbic acid, ascorbyl tetraisopalmitate, ascorbyl palmitate, sodium ascorbyl phosphate, ubiquinone) and/or a mixture of certain botanical antioxidants (eg; epigallocatechin-3 ...
denatured alcohol: ethanol made unsuitable for drinking, often via addition of denatonium.: solvent, carrier, astringent alkyl benzoate C12 - C15 : benzoic acid ester, C 6 H 5 COO(CH
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