Figure 3.

(A,B) Size and zeta potential of NPs coated with amino-polyethylene glycol (PEG), carboxy-PEG, both (zwitterionic), or with methoxy-PEG. (C) Protein amount per NP surface among differently coated NPs. (D) Normalized FRET ratio used to quantify Dil leakage from different NP formulations over time during incubation with FCS. (E) Quantification of fluorescence on agarose gel in which amino-PEG NPs were run after incubation with increasing amounts of BSA or FCS. Figure reproduced with permission from Abstiens et al. (2019) with modifications. *p < 0.05.