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. Author manuscript; available in PMC: 2018 Oct 31.
Published in final edited form as: ACS Nano. 2015 Jul 23;9(8):8004–8011. doi: 10.1021/acsnano.5b01514

Figure 5.

Figure 5.

Exposure to fluorescamine during degradation by a 4000 nM chymotrypsin caused the hydrogel to fluoresce over time as the fluorescamine binds to generated N-terminal amines. The increase in fluorescence was linear, with no significant increase in the surrounding media, indicating the hydrogel was collapsing as opposed to eroding.