Figure 2: Images of two-dimensional electrophoresis gels with annotation of the spots of the identified proteins. The image on the left shows a silver-stained gel of a recurrent pterygium. The right gel shows the results of the tissue from primary pterygium. Spots S1 through S11 represent the annotated spots. The pI gradient of the first dimension electrophoresis is shown at the top of the gels, and the migration of the molecular mass markers for SDS-PAGE in the second dimension is shown at the side of the gel.