For learning about the diversity of proteins by studying the electrophoretic profiles of various sources. Students separate proteins from bacterial, plant, serum, and milk proteins alongside a standard protein marker.

• For six lab groups (sharing three gels)
• Electrophoresis 60 minutes, staining 20 minutes, destaining 2 h

Also required: 3 polyacrylamide gels (12%), vertical gel electrophoresis apparatus, power supply, white light box, 5 to 50 µl adjustable or 20 µl fixed volume micropipette, fine tips, methanol, and glacial acetic acid.