Figure 2. Photomicrographs of ISH images of maxillary first molar roots stained for type I collagen (Col1a1) and type III collagen (Col3a1) are indicated (n = 3). Left lane (A, C, E, and G): type I collagen. Right lane (B, D, F and H): type III collagen. A and B, control; C and D, day 4; E and F, day 7; and G and H, day 14. Original magnification: x100. Bar in H = 150 µm.