Notice that each side of the cell, let's say, on the lumen side, contains a certain type of integral proteins or certain types of integral proteins. And the basilateral side, this side also contains its share of different types of integral proteins, proteins that basically allow the passageway of different types of ions and molecules. And what the Thai junctions do. So this is one tie junction, this is the second type of tie junction. What these Tie junctions basically do is they do not allow the lateral movement of integral proteins from our apical side, the lumen side of the cell membrane, to the basilateral side, the extracellular side of our cell membrane. Remember, inside an individual cell, inside the cell membrane, the phospholipids as well as the proteins are in a constant state of lateral motion.