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Representative stress-strain curves of 2.5 mg/mL uncrosslinked and crosslinked collagen networks. Uncrosslinked single layer (dotted line, dash-dot) collagen networks show higher strain at failure and greater extensibility than crosslinked matrices (dashed line, solid line). Layered matrices showed an increase in ultimate tensile strength for both uncrosslinked (single layer: dotted vs. four layer:dash-dot) and crosslinked (single layer: solid vs. four layer: dash) matrices.
