Profile: Amerigo Scientific is a distribution company focused on providing critical products and services to the biomedical and life science research communities. Gel electrophoresis is the most frequently used method for protein separation. The main principle of electrophoretic separation is to apply an electric field to force molecules to move through gel pores, separating them based on their molecular weight and total particle charge. In general, larger molecules migrate more slowly in the gel with a higher percent concentration than smaller ones. Electrophoretic separation can be performed under different conditions, either to maintain protein complexes intact or to dissociate them to obtain and identify specific components.