Fig. 4
From: Novel meso-substituted porphyrin derivatives and its potential use in photodynamic therapy of cancer
The transport mechanism of TAPP into LM3 cells. Cell uptake of TAPP at 1 μM and 5 μM at 4° and 37 °C during 90 min (a). Photodamage induced by the incorporated 5 μM TAPP for 90 min at 4° and 37 °C and illuminated at different light doses (b). Control: cells exposed to the vehicle and light-treated. Error bars are the standard deviation for three independent experiments