This is our lactose permeates. It consists of these two halves where each half consists of six membranespanic, alpha helices to form a total of twelve membrane spanning alpha helices. So we have one half and the other half. Now, this is the outside, the inside of our cell. So basically what happens is in this particular diagram we see that we have this space, a cavity in the inside portion of that particular transmembrane pump. And notice in this particular state it is open to the outside of the cell.