A transport protein that generates voltage across a membrane is called_________.

The sodium-potassium pump is the major electrogenic pump of the animal cells. The sodium pump is a type of active transport in which potassium ions are concentrated inside the cell must enter against a concentration gradient. The pump oscillates between two conformational states in a pumping cycle that transports three sodium ions out of the cell for every two potassium ions pumped into the cell. With each crank of the pump, there is a net transfer of one positive charge from the cytoplasm to the extracellular fluid, a process that stores energy in the form of voltage. The main electrogenic pump of plants, bacteria, and fungi is a proton pump, which actively transports hydrogen ions out of the cell.