The funnel is placed on top of our column, and inside the column, we have these pores gel beads. And so, as our fluid flows along our gel beads, that water doesn't actually dissolve our beads. So those beads are in soluble, but things can actually pass across those beads as a result of those tiny pores. So let's actually zoom in onto the molecular level and see what's taking place on the molecular level as we pour our mixture of proteins. So let's take a look at the following diagram. Let's suppose we have a mixture of three different proteins.