And so what that means is these negatively charged proteins will travel the quickest in this column that contains these negatively charged beats, while these very positive proteins will essentially not travel at all, because they will be stuck. They will be attractive to those negatively charged beats as a result of the electric attraction between positive charges and negative charges. Now, one analogy I can give is the following. Let's suppose we have two kids. One of these kids loves chocolate chip cookies, and the other one hates chocolate chip cookies. In fact, the second one is allergic to chocolate chip cookies.