Type I Collagen is a major structural component of the extracellular matrix (ECM). This fibrous protein is often used in three-dimensional (3D) collagen gels that simulate the in vivo cell environment better than the traditional 2D systems. Collagen I can also be used for coating surfaces, as it can form thin layers for culturing cells. ibidi’s Type I Collagen is a state-of-the-art, purified protein extracted from rat tail tendons without pepsinization. It is specially engineered for ibidi’s cell-based assays (e.g., chemotaxis assays in 3D gels, or 2D coating of lab cultureware). sterile, 5 mg/ml, 4 x 5 ml