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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Acta Biomater. 2013 Aug 2;10(4):1588–1600. doi: 10.1016/j.actbio.2013.07.031

Fig. 3.

Fig. 3

Dual growth factor delivery from star PEG-heparin hydrogels. i) Design of star poly(ethylene glycol)–heparin hydrogels showing decoupled mechanical and modular biomolecular characteristics. ii)Interactions of differently modified hydrogels on the different substrates. (A): representative fluorescence microscopy images after live/dead staining of HUVECs (scale bar 130 μm); (B): HUVECs proliferation/survival as accessed via cell numbers quantified by an MTT assay; (C): HUVECs morphology as accessed via cell circularity by the circularity calculation within ImageJ. Reprinted with permission from [66], copyright (2010) Elsevier and [67], copyright (2011) Elsevier.