Figure 2 of Jiang, Mol Vis 2010; 16:2092-2108.

Figure 2. Volcano plot of the gene expression changes in the canine glaucomatous retina. Negative expression changes denote transcripts detected at reduced levels in glaucomatous eyes. This plot also represents all expressed genes, including those with less than twofold expression changes. Vertical bars represent a twofold expression change. Probability values were derived by Student’s t-test.