Figure 7 of Jaworski, Mol Vis 2009; 15:2421-2434.

Figure 7. Effect of polyamine analogues on migration of primary cultures of pterygium cells. Plots show the relative migration of cells treated with either A: BENSpm (no serum), B: IPENSpm (no serum), or C: IPENSpm (5% serum). Migration was assayed in terms of the fluorescent signal at 480/520 nm. Error bars indicate the standard error of the mean. Each set of conditions was tested a minimum of four times.