Figure 13.

Proposed transportation kinetics of QDs in HeLa cells grown in the media with and without serum for 24 h. The models depict that the intracellular traffic kinetics of QDs in HeLa cells grown with serum (Upper) is noticeably distinctive from that of HeLa cells grown without serum (Bottom) after 24 h of QD treatment. (T1) indicates the transition of QDs from the endocytic vesicle towards the early endosome; (T2) indicates the transition of QDs from the early endosome towards the late endosome; (T3) indicates the transition of QDs from the late endosome to the lysosome. Each green arrow represents a slower transit rate of QDs in comparison with its counterpart rate indicated in red. Each red arrow represents a faster transit rate of QDs in comparison with its counterpart rate indicated in green.