These are shown in purple and we also have these green interactions and these are the interactions, the London dispersion forces, the Vanderbilt bonds between the adjacent red tails as shown in this diagram. And this is a stabilized system. So lipids such as ionized fatty acids will spontaneously form mice cells in water. This occurs because it minimizes the polar non polar interactions that we have here. It releases the water molecules and that stabilizes the interactions that now can exist between the water molecules and other water molecules and these heads. So it allows the polar heads to interact with water as well as with each other and it also basically hides these hydrophobic regions on the interior and allows them to interact with each other.