Electroelution without gel sectioning of proteins from sodium dodecyl sulfate-polyacrylamide gel electrophoresis: fluorescent detection, recovery, isoelectric focusing and matrix assisted laser desorption/ionization-time of flight of the electroeluate.

A method of direct electroelution of intact proteins, without gel sectioning and orthogonal to the orientation of electrophoretic migration, was developed in application to Novex gels, using a simple home-made experimental setup. Six model proteins covering the molecular mass range of 14-120 kDa were subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), stained with an aqueous solution of the fluorescent dye, SYPRO-red, and electroeluted from the intact gel. The sensitivity of visual detection was 0.