Summary of immunohistochemical results
| Antibody | Days after ulcer induction | Mucosa (ulcer margin) | Submusoca (ulcer base) |
| α1 (I) procollagen | 3 | + | +++ |
| 5 | ++ | +++ | |
| 7 | ++ | +++ | |
| 12 | ++ | +++ | |
| 15 | ++ | +++ | |
| 30 | ++ | +++ | |
| α1 (III) procollagen | 3 | − | + |
| 5 | − | + | |
| 7 | + | ++ | |
| 12 | + | ++ | |
| 15 | + | ++ | |
| 30 | + | ++ | |
| α1 (IV) procollagen | 3 | + | + |
| 5 | + | + | |
| 7 | +(+) | ++ | |
| 12 | +(+) | ++ | |
| 15 | +(+) | ++ | |
| 30 | +(+) | ++ |
−, +, ++, and +++ indicate the relative intensity of APAAP staining with individual primary antibodies during the healing process in ulcerated tissue compared with controls.