Fig. 15From: Penetration of CdSe/ZnS quantum dots into differentiated vs undifferentiated Caco-2 cellsModel of QD penetration depth in Caco-2 cells. Comparison of penetration depth and localization of QD-COOH and QD-NH2 in undifferentiated and differentiated Caco-2 cells after 3 days exposure to 45 µg cadmium ml−1. In undifferentiated cells, QDs were located intracellularly and partially in lysosomes. In differentiated cells, no penetration of QDs was observedBack to article page