英语翻译BackgroundGenes encoding secreted class III plant peroxi

英语翻译
Background
Genes encoding secreted class III plant peroxidases (EC1.11.1.7) are present in all land plants and form large multigenic families [1].In their regular peroxidative cycle,class III peroxidases catalyze the reduction of H2O2 by taking electrons to various donor molecules[2].An hydroxylic cycle,which leads to the formation of various radical species such as •OH or HOO•,has also been described [1].Plant peroxidases are involved in a broad range of physiological processes throughout the plant life cycle [3],such as the formation of phenolic polymers as well as auxin catabolism [4-6].The great number of plant peroxidases genes,the diversity of the processes catalyzed by them,as well as the presence of both highly conserved domains and variable parts in all their sequences suggest the existence of a functional specialization of these proteins [7].It is therefore imperative to link each individual gene with a precise role for a better understanding of the functions,the regulation and also the evolution of this key multifunctional enzyme family.