Advanced BioMatrix offers PhotoGel RUT Kit, a purified methacrylated gelatin kit for visible light (400-450 nm) photocrosslinkable hydrogels. PhotoGel provides 3D tunable gels with the unique attributes to be prepared at various concentrations and crosslinked to provide various gel stiffness. PhotoGel is produced from methacrylated gelatin (1 gram) where the gelatin has been modified by reacting the free amines, primarily the -amines groups of the lysine residues as well as the a-amines groups on the N-termini. >75% of the total lysine residues of the gelatin molecule have been methacrylated. The photoinitiator consists of Ruthenium and Sodium Persulfate to be formulated in 1X cell culture media or PBS, which allows visible light photocrosslinking of the gelatin at 400-450 nm.