Figure 4. Gel-NPs and Con-NPs were incubated with Hank’s solution, Hank’s solution with gelatinase (Collagenase IV) at several concentrations at 37°C for 24 hrs.

For 4-A, sample 1, refers to Gel-NPs without CollagenaseIV, sample 2 refers to Gel-NPs with CollagenaseIV, sample 3 refers to Con-NPs without CollagenaseIV and sample 4 refers to Con-NPs with CollagenaseIV, respectively. After incubating for 24 hrs, precipitation was only found in Sample4 (Gel-NPs with CollagenaseIV). 4-B showed the relationship between absorbance (indicating the amount of precipitation) and CollagenaseIV Concentration.