Table 3. MMP 1 Activity Assay. The concentrations of the active forms of MMP 1 in melted corneal tissue were determined by interpolation from the standard curve.

Specimen	Concentration of active MMP 1 (ng/ml)
S1	0.69
S2	0.08
S4	0.23
S5	0.7
S6	0.23
S7	0.0
S8	0.39
S9	0.0
S10	3.03
S11	1.22