Fig. 2.

Fluorescence imaging of ZP1-TPP in live HeLa cells. HeLa cells were pretreated with a 5-µM solution of ZP1-TPP in dye- and serum-free DMEM for 30 min (37 °C, 5% CO₂). Initial fluorescence images reveal a distinct punctate pattern that does not respond significantly to medium supplemented with 50 µM ZnPT or 100 µM TPEN. (Scale bar: 25 µm.)