Fig. 4From: Near-infrared quantum dots labelled with a tumor selective tetrabranched peptide for in vivo imagingBinding and internalization (T 1, 2, and 4 h) of NT4 conjugated with NIR QDs (red) on PANC-1 human pancreas adenocarcinoma cells. Nuclei are stained with DAPI (blue) and plasma membranes are stained with wheat germ agglutinin Alexa Fluor 488 (green)Back to article page