Running SDS-PAGE gelsSet up the electrophoresis apparatus1. Retrieve one of the SDS-PAGE gels from the refrigerator.2. Carefully remove the comb from the spacer gel.3. Remove the casting frame from the gel cassette sandwich and place the sandwich against the gasket on one side of the electrode assembly, with the short plate facing inward. Place a second gel cassette or a buffer dam against the gasket in the other side of the electrode assembly.4. Clamp the green clamps on the sides of the electrode assembly (below).5. Lower the chamber into the electrophoresis tank.6. Fill the space between the two gels with Tris-glycine running buffer. This forms the upper chamber for electrophoresis.7. Add Tris-glycine running buffer to the outer (lower) chamber until the level is high enough to cover the platinum wire in the electrode assembly.