Fibronectin Adhesion-promoting Peptide (Heparin Binding Peptide) is one of the heparin-binding amino acid sequences found in the carboxy-terminal heparin-binding domain of fibronectin. It promotes assembly of mesenchymal stem cell (MSC) spheroids into larger aggregates. Fibronectin Adhesion-promoting Peptide directly promotes the adhesion, spreading, and migration of endothelial cells by reacting with heparin binding domains of cells.