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Uptake of Au NPs bearing different surface ligands by HT-29 cells under normoxic and hypoxic condition depends on CA IX expression and on the Au surface ligands: a) CA IX expression in HT-29 cells under normoxic and hypoxic conditions, determined via western blotting; b) ICP-OES quantification and c) confocal microscopy post-silver staining for the uptake of ligand-functionalized Au NPs under both normoxic and hypoxic conditions (scale bar = 10 µm).
