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Fibroblasts spreading morphologies in oxime RGD ligated gels, (a) on top of (2D) and (b) within (3D) oxime, semicarbazone and hydrazone cross-linked gels after 24 h. Green color represents actin staining and blue color represent nucleus staining. scale bar: 25 µm for 2D, 50 µm for 3D images, and 25 µm for 3D insets.
