Fig. 4.

Cellular uptake measured via GF-AAS after 1 h, 4 h, and 24 h incubation of MDA-MB 231 cells with complexes X1–X3 at 2.5 µM, respectively. MDA-MB 231 cells without addition of a complex (Δ) served as reference. Data are expressed as mean + SD of two independent experiments, measured in triplets