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Cytotoxicity of SOD1, SOD1-POx and PEG5000-b-PLL50 in CATH.a neuronal cells. Cells were incubated with 80 μg/mL of SOD1 or SOD1-polymer conjugates for 1 h, 6 h or 24 h in full medium and were allowed to grow for another 48 h. Cytotoxicity was determined by the cell counting assay. Data are means ± SEM (n=6).
