Figure 1. Images of two-dimensional electrophoresis gels with annotation indicating the spots of the identified proteins. The image on the left shows the silver-stained gel of a failed filtering bleb. The right gel shows the results for a control tissue. Spots S1 through S8 are indicated. The pI gradient of first dimension electrophoresis is shown above the gels, and the migration of the molecular mass markers for SDS-PAGE in the second dimension is shown at the side. Gel images shown are representative.