Figure 2
From: δ-Aminolevulinic acid cytotoxic effects on human hepatocarcinoma cell lines
Hemin effect on ALA toxicity. The effect of Hemin was determined by exposing HEP G2 and HEP 3B cells to 0.5 mM ALA without (white) or with 16 μg/ml Hemin (grey) for 24 h before the MTT assay was performed. Controls were grown with 16 μg/ml Hemin alone (black). Viability was expressed in terms of population growth, as percent of an untreated control population with standard error of the mean (SEM).