In addition proteins are separated by gel electrophoresis on the basis of their apparent molecular weight, which is not accomplished by immunoelectrophoresis, but nevertheless immunoelectrophoretic methods are still useful when non-reducing conditions are needed.
Ademais, as proteínas son separadas por electroforese en xel baseándose no seu peso molecular aparente, que non é realizado por inmunoelectroforese, pero, non obstante, os métodos inmunoelectroforéticos son aínda útiles cando se necesitan condicións non redutoras.