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Effect of PEG on cytotoxicity of PAMD in HepG2 and U2OS cells. Cell viability was measured by MTS assay after 24 h incubation with increasing concentrations of polymers. Polymer concentration for PEG-PAMD copolymers is expressed as PAMD concentration only (i.e., excluding PEG). Results are expressed as mean ± SD (n=3).
