Fig. 4From: UVB-mediated down-regulation of proteasome in cultured human primary pterygium fibroblastsPterygium fibroblasts viability (a) and proteasome chymotrypsin-like activity in these cells (b) after exposure to UVB radiation at different doses (0–50 mJ/cm2). Data represent the mean ± SD of three independent experiments. (*) indicates significant difference (p < 0.05) compared to control (non irradiated)Back to article page