Advanced BioMatrix offers PhotoHA, a methacrylated hyaluronic acid (HA) for UV-crosslinkable hydrogels. These hydrogels provide native-like 3D HA gels with the unique attributes to be prepared at various concentrations and UV-crosslinked to provide various gel stiffness. The kit comes with 100 mg of lyophilized methacrylated hyaluronic acid and 100 mg of irgacure photoinitiator. Hyaluronic acid is the most abundant glycosaminoglycan in the body being an important component of several tissues throughout the body. While it is abundant in extracellular matrices, hyaluronan also contributes to tissue hydrodynamics, movement and proliferation of cells, and participates in a number of cell surface receptor interactions. For the majority of cell types, it is recommended to add additional ECM proteins to the hyaluronic acid hydrogels. The proteins provide important cell binding sites.