Two-dimensional gel electrophoresis.

Two-dimensional gel electrophoresis combines two different electrophoretic separating techniques in perpendicular directions to provide a much greater separation of complex protein mixtures than either of the individual procedures. Variations of the most common two-dimensional technique are described in this unit, namely isoelectrofocusing (IEF) and SDS-PAGE. This unit also includes support protocols describing pI standards and pH profile measurements, casting Immobiline gels, preparation of tissue culture cells and solid tissues for isoelectricfocusing, preparation of molecular weight standards for two-dimensional gels, and two-dimensional protein databases.