Figure 2From: DNA damage and cytotoxicity in type II lung epithelial (A549) cell cultures after exposure to diesel exhaust and urban street particlesColony forming ability expressed as relative to the number of colonies in the control, which are set to 1. The dots represents mean ± SEM; (n = 3). Decreased colony forming ability of cell cultures exposed to SRM2975 (#) SRM1650 (*) compared to the unexposed cultures (p < 0.05, Kruskal-Wallis test).Back to article page