Distribution of differentially expressed protein spots.

<p>The samples were separated using IPG gel (pH 3–10, 18 cm) in the first phase and 12.5% SDS-PAGE; 120 µg of protein was used in each gel. The spots showing significant differences between PD patients and controls (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0095684#pone-0095684-t001" target="_blank">Table 1</a>) were labeled in a 2-DE gel from PD group.