Structural features of biologically ECM analogs 1 chemical composition (ligand identity) 2. macromolecular 3. pore structure(ligand density) structure(ligand duration) Diagrams removed due to copyright considerations 4. orientation of pore channels (ligand orientation)Structural features of biologically ECM analogs 3. pore structure (ligand density ) 2. macromolecular structure (ligand duration ) 1. chemical composition (ligand identity ) 4. orientation of pore channels (ligand orientation ) Diagrams removed due to copyright considerations