Fig. 2

Cytotoxicity and radiation protection of Ag₁₄ clusterzymes in vitro. a Viability of L929 cells after incubation with Ag₁₄ clusterzymes at doses from 0 to 280 μg/mL for 24 h. b Viability of L929 cells treated with or without Ag₁₄ clusterzymes (280 μg/mL) after radiation at the dose of 0 and 4 Gy gamma ray. c, d Colony assay of L929 cells treated with or without Ag₁₄ clusterzymes (280 μg/mL) upon radiation at a dose of 2 Gy. e, f Comet images of L929 cells treated with or without Ag₁₄ clusterzymes (280 μg/mL) after radiation at a dose of 4 Gy, the tail length positively correlated to DNA damages in cells. Scale bars are all 50 μm. p values: ***p < 0.001, **p < 0.01, or *p < 0.05, ANOVA