Electrophoresis - main variables. Supports for electrophoresis. Variations on a theme. Electrophoresis in gels. The electrophoresis of native and denatured proteins. The electrophoresis of nucleic acids. Visualization of separated materials. Apparatus and materials for electrophoresis. Safety: read this before commencing work. Appendix 1. Choices in electrophoresis. Appendix 2. Applications of the main techniques. Appendix 3. Troubleshooting.