Figure 5

SDS-PAGE gels of conditioned medium from L-2 cells treated with 125 μg fine or nanoparticle carbon black for 24 hours. The negative control is represented by cells treated with medium only (M). Gel A was run under non-reducing conditions and Gel B was run under reducing conditions via the addition of DTT. Marker bands and corresponding molecular weights (kDa) are indicated at the left hand side of the gels. M = Medium Only, F = Fine carbon black treatment, N = Nanoparticle carbon black treatment