Proteins are very important to every living organism because they are responsible for almost every function at the cellular level. Proteins in a cell are folded in very specific ways, stabilizing them. If the protein is removed from the cellular environment, they become unstable and unfold. This is problematic because unfolded proteins lose their activity and are no longer able to perform their specific cellular functions. Understanding protein stabilization is important because proteins can have therapeutic uses if they retain their activity. One way to effectively stabilize proteins is to put them in a crowded solution of macromolecules. Research has shown that crowding proteins stabilizes them and maintains their activity more than uncrowded proteins. It was seen that phycocyanobilin proteins from Spirulina have increased stability when they are in a crowded solution of macromolecules as opposed to an uncrowded solution.