Advanced BioMatrix offers PhotoCol, a purified methacrylated Type I bovine collagen kit. PhotoCol provides native-like 3D collagen gels with the unique attributes to be prepared at various concentrations and crosslinked to provide various gel stiffness. The PhotoCol kit consists of purified methacrylated Type I bovine collagen as the core component with other support reagents in the kit. Approximately 40% of the total lysine residues of the collagen molecule have been methacrylated. The collagen is extracted from bovine hide and contains a high monomer content. A bottle of 20 mM acetic acid solution is provided to solubilize the lyophilized methacrylated collagen at concentrations ranging from 3 to 8 mg/ml. The neutralization solution consists of an alkaline 10X phosphate buffered saline (PBS) solution which provides physiological salts and pH in the final mixture.