Oxidation of hydroquinone by both cellular and extracellular grapevine peroxidase fractions

The optimization of the fermentation process of wheat germ for flavonoids and two benzoquinones using EKF-ANN and NSGA-II

Bi-objective optimization of wheat germ fermentation using EKF-ANN combined with NSGA-II.

Hydroquinone peroxidase activity of maize root mitochondria

The oxidation of hydroquinone with H(2)O(2) in the presence of mitochondria isolated from maize (Zea mays L.) roots was studied. The results indicate that a reduced form of quinone may be a substrate of mitochondrial peroxidases. Specific activities in different mitochondrial isolates, the apparent K (m) for hydrogen peroxide and hydroquinone, and the influence of some known peroxidase inhibitors or effectors are presented. Zymographic assays revealed that all mitochondrial peroxidases, which were stained with 4-chloro-1-naphthol, were capable of oxidizing hydroquinone. A possible antioxidative role of hydroquinone peroxidase in H(2)O(2) scavenging within the mitochondria, in cooperation with ascorbate or coupled with mitochondrial NAD(P)H dehydrogenases, is proposed.