*2.1. Materials*

Tert-butyl hydroperoxide (t-BHP), sodium dodecyl sulfate (SDS), phosphotungstic acid, buthylated hydroxytoluene, 2-thiobarbituric acid and malonaldehyde bis(dimethyl acetal), the Bicinchoninic protein determination assay and the anti-α-tubulin were purchased from Sigma-Aldrich Chemical Co. (St. Louis, MO, USA). The following were purchased from Abcam Inc., (Cambridge, MA, USA): rabbit polyclonal anti-PRDX1, mouse monoclonal anti-PRDX6, mouse monoclonal anti-4-Hydroxynonenal (4-HNE), rabbit polyclonal anti-catalase, and 8-hydroxy-deoxyguanosine (8-OHdG). Anti-thioredoxin 1 antibody was purchased from Cell Singaling Thecnology (Danvers, MA, USA), Polyvinylidene fluoride (PVDF) membranes (0.22 μm pore size; Osmonics Inc., Minnetonka, MN, USA), donkey anti-rabbit IgG and goa<sup>t</sup> anti-mouse IgG, both conjugated to horseradish peroxidase (Cedarlane Laboratories Ltd., Hornby, ON, Canada), an enhanced chemiluminescence kit (Lumi-Light; Roche Molecular Biochemicals, Laval, QC, Canada) and radiographic films (Denville Scientific, Inc., Saint-Laurent, QC, Canada) were also used for immunodetection of blotted proteins. Other chemicals were used at the reagen<sup>t</sup> level.
