Protein abundance for heat shock protein 70 (HSP70), heat shock protein 90, manganese superoxide dismutase (MnSOD), and nuclear factor erythroid 2-related factor 2 (Nrf2) in ambulatory controls (CON), hindlimb unloaded + scrambled peptide (HU), and HU + gp91ds-tat (HUG). Representative immunoblots with Ponceau stain as a protein loading control are found in (A) HSP70, (B) HSP90, (C) MnSOD, and (D) Nrf2. Protein abundance quantification was determined using Western immunoblotting and quantified using ImageJ for HSP70, HSP90, MnSOD, and Nrf2. (a) designates significantly different means than CON; (b) represents a significance difference vs. HU. MnSOD ANOVA was significantly different (p = 0.049) with a downward trend for HU and HUG groups compared with Control solei.