Fig. 2. Protein sequestration behaviours of coacervates with reduced σ. (a) Fluorescence images of rhodamine-labelled β-gal (red) and FITC labelled BSA (green) sequestered in coacervate droplets prepared at 0 mM NaCl (left, PEG-P(Asp-Pr-OH)-based coacervate; right, PEG-P(Asp-Bu)-based coacervate). The values represent the linear charge density of polyanions (σ). (b) Encapsulation efficiency (EE) of β-gal (top) and BSA (bottom) for coacervates with different σ (n = 3, * = p < 0.05. n. s: not significant).
