Reversible binding surface

A method for the selective disassociation of at least one bound glycosaminoglycan from a plasma polymerized surface of an organic monomer comprising an allylamine, said method comprising in consecutive order:

• providing a plasma polymerized surface comprising said allylamine;
• coating said plasma polymerized surface with a solution comprising phosphate buffered saline and at least one glycosaminoglycan;
• incubating said coated plasma polymerized surface to induce binding of said at least one glycosaminoglycan;
• contacting said surface with at least one agent having a salt concentration of about 500 mM NaCl to about 2 M NaCl, wherein said agent provides for selective disassociation of said at least one bound glycosaminoglycan from said plasma polymerized surface;
• washing said incubated coated plasma polymerized surface;
• incubating said washed plasma polymerized surface with a solution comprising tumor necrosis factor-inducible gene 6 protein (TSG-6);
• and
• detecting an amount of TSG-6 bound to said plasma polymerized surface, wherein said amount is inversely indicative of the selective disassociation of said at least one bound glycosaminoglycan from said plasma polymerized surface.