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Fluorescence micrographs of live (green) and dead (red) NIH3T3 fibroblasts cultured in (A) 2D and (C) 3D, and human primary dermal fibroblasts cultured in (B) 2D and (D) 3D. Hydrogel was composed of 4 wt% K830, 4 wt% BQ6, 4 unit/ml of tTG. Image magnification at 10x (A&B) or 20x (C&D).
