Many Proteins have ionic charges that can attract each other (e.g. Formation of salt bridges) or repel each other. On the other Hand, Proteins are mostly immersed in water that screens most of the Electric charges of the proteins. The reason is that water is a dielectric, the H2O-molecules can be polarized easily. So the Electrostatic Forces are reduced in aqueous solution.
Now I am asking which Proteins can be easily affected when applying an Electric field? That means which Proteins will Change their conformation substantially even when weak Electric fields are applied?
Can some proteins immersed in water also be dependent on external Electric fields?