Figure 1

Detection and selection of a differential expression profile zone. Silver staining pattern of a representative 15% SDS-PAGE of an ascitic fluid sample with more than 250 proteins resolved, after elimination of abundant proteins; an area with a differential expression profile showing nine protein spots, present in 100% of samples, was selected (black square); schematic representation of the differential expression area and a closer view of the resolution of the corresponding spots (a-g).