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Dose-dependent cytotoxicity of DH-G4-DBCO and DH-P-G4-PDBCO to HN12 cells (A) and NIH3T3 fibroblasts (B) as determined by WST-1 assay. The bars and error bars are means ± SD (n = 6). *p < 0.05 and **p < 0.01 versus no treatment (DH concentration at 0 mg/mL).
