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Degradation profile of acellular collagen foams. Degradation of collagen foams incubated in A) chondrogenic medium and B) chondrogenic medium supplemented with recombinant human MMP1, 2, 7, or 13 (30 ng mL−1) over time characterized as dry weight loss and expressed as a percentage of initial dry weight. Proteinase K-driven degradation is used as a positive control. Chondrogenic medium without exogenous enzymes is used as a negative control. Values represent means ± SD (n = 3).
