electrophoresis /ilek′trōfərē″sis/ [Gk, elektron + pherein, to bear] , the movement of charged suspended particles through a liquid medium in response to changes in an electric field. Charged particles of a given substance migrate in a predictable direction and at a characteristic speed. The pattern of migration can be recorded in bands on an electrophoretogram. The technique is widely used to separate and identify serum proteins and other substances. −electrophoretic, adj.