Figure 4.
HRP stability in silk films stored at different temperatures for 5 months. (a) non-methanol treated film containing 1 wt% HRP. (b) non-methanol treated film containing 0.1 wt% HRP. (c) methanol treated film containing 0.1 wt% HRP. The activity could not be measured in the case of methanol treated film containing 1 wt% HRP due to high enzyme concentration in a weighable silk film. Values are average ± standard deviation of a minimum of N=5 samples for each group. # indicates no significant difference between samples (p > 0.05). * indicates significant difference between samples (p < 0.05).