Peroxidase derivative

Palaniappan V, Temer J (1989) Resonance Raman spectroscopy of horseradish peroxidase derivatives and intermediates with excitation in the near ultraviolet. J Biol Chem 264 16046-16053... 

Grafting of Functional Molecules Insights into Peroxidase-Derived Materials... 

As has been discussed above, one of the particularly important reactions involving peroxidase-derived radicals is redox mediation, or mediation by electron transfer [10], In this mechanism, radicals (R ), which have been generated by a peroxidase-catalyzed reaction, Eq. (1), may act as diffusible oxidants to oxidize secondary substrates (SH) ... 

Products of Peroxidase-Derived Reactive Halogenating Species Targeting Conventional Lipids... 

As shown in Figure 4.1, there are additional reactive sites in phospholipids that potentially may be halogenated in the presence of peroxidase-derived hypohalous acids. In 1998, studies by Winterbourne et al. showed both hypochlorous acid and hypobromous acids react with both unsaturated aliphatic residues and the ethanol-amine of phosphatidylethanolamine (Carr et al. 1998). These studies showed that the amine was more reactive than alkenes and that the alkenes formed halohydrins only after the amine was consumed by the hypohalous acid. This was similar to the findings with plasmalogens which showed the chlorohydrins were only produced once the vinyl ether bond was consumed. Additionally these earlier studies demonstrated that bromoamine was reactive in producing bromohydrins, and this activity was greater than that observed with chloramines (Carr et al. 1998). Others have also shown the reactivity of hypohalous acids with ethanolamine (Jaskolla et al. 2009), but it is unclear whether these compounds are stable in cells or in vivo. 

Albert, C. J., A. K. Thukkani, R. M. Heuertz, A. Slungaard, S. L. Hazen, and D. A. Ford. 2003. Eosinophil peroxidase-derived reactive brominating species target the vinyl ether bond of plasmalogens generating a novel chemoattractant, alpha-bromo fatty aldehyde. J Biol Cfem 278(1 n 8942-.50. 

Oxidative cleavage of ring B of anthraquinones yields benzophenone derivatives which are transformed to xanthones. Both hydroxyl groups of the symmetrically substituted benzene nucleus of the benzophenone carboxyhc acid intermediate can participate in the closure of the xanthone ring. From the xanthones dimeric products are formed probably via phenol oxidase or peroxidase-derived radicals (C 2.3.1 and C 2.4.1). 

Enzymatic Polymer Functionalisation Advances in Laccase and Peroxidase Derived Lignocellulose Functional Polymers... 

Nyanhongo GS, Kudanga T, Nugroho Prasetyo E et al (2010) Grafting of functional molecules insights into peroxidase derived materials. In Torres E, Ayala M (eds) Biocatalysis based on heme peroxidises. Springer, New York... 

Although there is no evidence for the occurrence in the oxidatic reaction of peroxidase intermediates other than the free enzyme and the peroxide compounds, reacting rapidly enough to be involved catalytically in the oxidatic reaction, other peroxidase derivatives are produced from time to time in the presence of autoxidizing DHF. 

III and the other peroxidase derivatives (Eq. 6) indicates that ferro peroxidase, which autoxidizes to form ferric peroxidase, cannot engage in reactions such as those shown. The theory expressed in Eq. (13) must therefore be in error and the theory of Eq. (12) escapes only by postulating unknown and chemically improbable intermediates (peroxidase Fe +HgOj). 

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