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Viability of A549 cells after incubation with G3 PPI dendrimers or Au NPs modified with G3 PPI dendrimers for 24 h at 37 °C. It showed that at a concentration of G3 PPI dendrimer up to 4 μM (which is relevant to our cell uptake study), both G3 PPI dendrimer and Au NPs modified by G3 PPI dendrimers are non-toxic.
