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Adhesion of fibroblasts to photo-crosslinked PEG hydrogels functionalized with a positive control adhesive peptide sequence (Arg-Gly-Asp, or RGD) or functionalized with select nylon-3 copolymers (Pol-5, Pol-9, and Pol-15), as measured by DNA content of cells bound to the hydrogel surface. *p<0.05 compared to PEG; ^p<0.0001 compared to RGD.
