The effect of l-ascorbic acid on the in vitro activity of polyphenoloxidase from potato
- 1 October 1953
- journal article
- research article
- Published by Portland Press Ltd. in Biochemical Journal
- Vol. 55 (3) , 392-399
- https://doi.org/10.1042/bj0550392
Abstract
The effect of ascorbic acid and its oxidation products on the activity of potato polyphenoloxidase was studied using a modified colorimetric procedure. The enzyme undergoes a marked denaturation in the presence of ascorbic acid which is not reversed by ionic Cu. Cu ions catalyze the rate of formation of colored condensation products from o-benzoquinone. Previous work on polyphenoloxidase systems is discussed in the light of these findings.Keywords
This publication has 17 references indexed in Scilit:
- Tyrosinase and polyphenoloxidase. The role of metallic ions in melanogenesisBiochimica et Biophysica Acta, 1952
- [Action of bivalent cations on in vitro melanogenesis].1951
- Observations on the use of Escherichia coli for the reduction and estimation of dehydroascorbic acidBiochemical Journal, 1951
- *CUIVRE, POLYPHENOLOXYDASE (TYROSINASE), CATECHOL ET ACIDE ASCORBIQUE1951
- A Competitive Inhibitor of TyrosinaseAustralian Journal of Biological Sciences, 1951
- Oxidation of Catechol by Tea-OxidaseNature, 1950
- The oxidation of catechol and homocatechol by tyrosinase in the presence of amino-acidsBiochemical Journal, 1949
- Inhibition of urease by copper salts in the presence of ascorbic acid and related substancesBiochemical Journal, 1946
- Studies on the ‘fermentation’ of Ceylon teaBiochemical Journal, 1943
- The influence of halides on the oxidation of ascorbic acidBiochemical Journal, 1941