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Biotechnol Bioeng. Author manuscript; available in PMC 2015 Feb 1.
Published in final edited form as:
Biotechnol Bioeng. 2014 Feb; 111(2): 396–403.
Published online 2013 Sep 6. doi: 10.1002/bit.25097
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Figure 2

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Confocal cross-sectional fluorescence images confirm that collagen (light gray) functionalization is uniform along the PA gel surface for gels of various stiffness. Red fluorescent latex beads (dark grey on image) were embedded within the gels to aid visualization. The images represent gels with Young’s modulus of (a) 1 kPa, (b) 10 kPa, and (c) 100 kPa. Scale bar = 100 μm.

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