Fig. 5

Z-stack imaging series of MSCs treated with carboxylated QDs for 24 h. Z-stack images were collected at 0.2 µm steps by confocal laser scanning microscopy. Green corresponds to Alexa-Fluor 488 nm-conjugated phalloidin labeling actin, red corresponds to QDs and blue corresponds to Hoechst labeling nucleus. Scale bar for all images 30 µm