Quality control of recombinant fusion proteins. (A) Image of a Coomassie-stained E-PAGE gel, here shown for the purification of GST fusion proteins. (B) 96 samples can be loaded on a single E-PAGE gel comprising twelve lanes in eight rows (A-H). A single additional lane is available per row to accommodate a molecular weight standard. (C) Single lanes (each 2 cm in length) are assembled to an artificial gel image to facilitate sample analysis. (D) Example molecular weight marker separated by the E-PAGE system.