Sika Deer Antler Collagen Type I-Accelerated Osteogenesis in Bone Marrow Mesenchymal Stem Cells via the Smad Pathway

Figure 1

HPLC profiles of collagen I of SDA. Collagen I was treated with trypsin (1 : 1000, w/w) at 37°C for 3 h after boiling water.