Studies on L-Ascorbic Acid Derivatives. VI. Phosphorylation of L-Ascorbic Acid and Its Isopropylidene Derivative
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L-Ascorbic Acid Peroxidase
Euglena gracilis was found to contain a peroxidase that specifically requires L-ascorbic acid as the natural electron donor in the cytosol. The presence of an oxidation-reduction system metabolizing L-ascorbic acid was demonstrated in Euglena cells. Oxidation of L-ascorbic acid by the peroxidase, and the absence of ascorbic acid oxidase activity, suggests that the system functions to remove H20...
متن کاملTopical L-ascorbic acid: percutaneous absorption studies.
BACKGROUND Reactive oxygen species generated by ultraviolet light result in photocarcinogenic and photoaging changes in the skin. Antioxidants protect skin from these insults. OBJECTIVE This study defines formulation characteristics for delivering L-ascorbic acid into the skin to supplement the skin's natural antioxidant reservoir. METHODS L-ascorbic acid or its derivatives were applied to ...
متن کامل2-O-Acyl-3-O-(1-acyloxyalkyl) Prodrugs of 5,6-Isopropylidene-l-Ascorbic Acid and l-Ascorbic Acid: Antioxidant Activity and Ability to Permeate Silicone Membranes
2-O-Acyl-3-O-(1-acyloxyalkyl) prodrug derivatives, 15, of 5,6-isopropylidene-l-ascorbic acid, VCA, and l-ascorbic acid, VC, have been characterized by measuring (1) their solubilities in water (SAQ) and in 1-octanol (SOCT); (2) the ability of one member of the homologous series, 15a, to diffuse through a silicone membrane from its application in propylene glycol:water (PG:AQ), 30:70; (3) the ab...
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The medium used contained 3g of substrate, 150ml of 1/15M phosphate buffer and 150ml of sterile distilled water. 0.5g (dry weight) of the adapted cells was added to the medium and the whole was incubated at 30•‹ for 20 hours. For detecting the intermediate products, paper chromatography was chiefly used. For developing the nonvolatile acids, n-butanol-acetic acid-water (4:1:1) was used and the ...
متن کاملBiological synthesis of ascorbic acid: the conversion of derivatives of D-galacturonic acid into L-ascorbic acid by plant extracts.
Broquist, H. P., Kohler, A. R., Hutchison, D. J. & Burchenal, J. H. (1953). J. biol. Chem. 202, 59. Brown, E. G., Goodwin, T. W. & Pendlington, S. (1955). Biochem. J. 61, 37. Buchanan, J. M., Levenberg, B., Flaks, J. G. & Gladner, J. A. (1955). In Amino Acid Metabolism, p. 743. Ed. by McElroy, W. D. & Glass, B. Baltimore: Johns Hopkins Press. Fosse, M. R. (1914). C.R. Acad. Sci., Paris, 158, 10...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1971
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.19.1433