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. Author manuscript; available in PMC: 2014 Feb 4.
Published in final edited form as: Biotechnol Prog. 2013 Jun 22;29(5):1255–1264. doi: 10.1002/btpr.1761

Figure 2.

Figure 2

PC12 cell viability after 24 h encapsulation in PEG hydrogels with covalently incorporated ligand: effect of ligand type and density. All hydrogels were 10% w/v and synthesized with PEH-SH 2 3.4 cross-linker: (a). PC12 cell viability as a function of ligand type − 100 µM of RGDS, IKVAV or YIGSR. Asterisks designate significant differences from hydrogels without ligand (n ≥ 18); (b) PC12 cell viability as a function of RGDS ligand concentration (n = 30). Cell viabilities at ligand concentrations of 50 µM and above are significantly different from viabilities at ligand densities of 2.5, 5 and 25 µM.