Heparin Methacrylate (HepMA) is a heparin derivative, modified with methacrylate, making it suitable as a material for tissue engineering scaffolds and as a bioink for 3D printing. Under the influence of the photoinitiator LAP (HY-44076), HepMA self-assembles into fibrous hydrogels that target bioactive adhesion sites, providing inherent support to tissue cells and promoting biodegradation. Its applications include cell culture, bioprinting, and tissue engineering.