(A) Domain map of human tropoelastin. Methacrylation of (B) tropoelastin and (C) gelatin. (D) A schematic to describe the formation of MeTro/GelMA hydrogels. GelMA and MeTro polymers are covalently crosslinked upon exposure to visible light in the presence of LAP photoinitiator to form a highly elastic hydrogel network. Mechanical properties of MeTro, GelMA and MeTro/GelMA composite hydrogels, showing (E) representative tensile stress-strain curves; (F) tensile moduli; (G) extensibility; (H) representative compressive stress-strain curves; (I) compressive moduli; and (J) energy loss. (* p<0.05, ** p<0.01, *** p<0.001, **** p<0.0001)