Figure 6. Histological and immunohistochemical analysis of in vivo transplantation. (A, B) Safranin O staining. Immunohistochemistry for (C, F) COL1, (D, G) COL2, and (E, H) SOX-9. LNC represents chondrocytes transfected by AP001505.9 lentivirus. NC represents chondrocytes transfected by negative control lentivirus. Scale bar, 50 μm.