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. Author manuscript; available in PMC: 2009 Mar 2.
Published in final edited form as: Arch Ophthalmol. 2008 Dec;126(12):1655–1663. doi: 10.1001/archophthalmol.2008.544

Figure 7.

Figure 7

Immunostaining results for the matrix metalloproteinases (MMPs). A-C, MMP-1 in healthy corneas, corneas with keratectasia, and corneas with keratoconus, respectively. D-F, MMP-2 in healthy corneas, corneas with keratectasia, and corneas with keratoconus, respectively. G-I, MMP-3 in healthy corneas, corneas with keratectasia, and corneas with keratoconus, respectively. Note that the intensity of the MMP-1 staining is very low in the epithelium of the healthy corneas and the corneas with keratectasia. By contrast, strong epithelial staining of MMP-1 is present in the keratoconus case. The MMP-2 and MMP-3 staining was at the background level or absent in healthy corneas, the corneas with keratoconus, and the corneas with keratectasia (chromagen 3,3-diaminobenzidine tetrahydrochloride, original magnification ×126).