Figure 4: Calpains (μ- and m-) (U/min·mg total protein) activities in brain cortex and hippocampus homogenates. Samples were analyzed according to the procedures described in Section 2.11.2. Treatments are indicated with different colors. Control (white bars), Cu (gray bars), Cho (dark gray bars), and CuCho (black bars). Results are expressed as mean of 6 rats assayed in triplicate ± standard deviation (SD). Significant differences were indicated by letters (data with distinct letters are statistically different between them at ).