A precast gel and membrane combination unit for use in gel electrophoresis and membrane transfer for protein analysis, and method of use. Transparent electrically conductive polymer plate(s) house an electrophoresis gel and immunoblotting membrane. The gel and membrane are positioned between two plates of conductive polymers or plates having an electrically conductive layer or film. During the electrophoresis step, electric current moves proteins through the gel allowing for protein separation. Then, without removing or reorienting the gel or apparatus, the electrical contacts are switched to allow the flow of electricity to run perpendicularly through the gel via the conductive polymers, which will allow the proteins to transfer to the membrane housed in the same precast gel and membrane combination unit. The apparatus allows the user to visualize the steps of protein separation and protein transfer without transferring the gel between electrophoresis and transfer steps.