3D bioprinting is being applied to regenerative medicine to address the need for complex scaffolds and tissues and organs suitable for transplantation. We are developing BioInks suitable for 3D printing using our rhCollagen. Our researchers have chemically modified the gelling behavior of the collagen to adapt the biological molecules for printing. Instead of gelling like unmodified collagen, the BioInk remains fluid during printing. Once the BioInk is irradiated with UV light, it cross-links and cures to form hydrogel. The rheological properties of our rhCollagen-based BioInk enable the printing of 3D constructs with controlled physical and biological properties.