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Phototoxicity (light dosage: 1.5 J cm−2 at λ 670 nm, left) and dark toxicity (right) after incubation with ZnPc photosensitizers (● ZnPc-(Lys)5, ○ ZnPc-S2P2, ▼ ZnPc-S4): a) K562 cells, 2 h incubation; b) K562 cells, 24 h incubation; c) HELF cells, 2 h incubation. Data represent the mean ± SEM of three independent experiments, each performed in triplicate.
