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. 2017 Jun 29;12:4663–4678. doi: 10.2147/IJN.S136646

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© 2017 Tong. This work is published and licensed by Dove Medical Press Limited

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Characterization of bright-field and fluorescent images at pH 7.4, respectively. Bright-field (A) and fluorescence (B) images of exenatide–PEG-b-(PELG₅₀-g-PLL₃) and exenatide–FITC-PEG-b-(PELG₅₀-g-PLL₃).

Abbreviations: SEM, scanning electron microscopy; PEG-b-(PELG₅₀-g-PLL₃), poly(ethylene glycol)-b-brush poly(l-lysine) polymer; FITC-PEG-b-(PELG-g-PLL), FITC-poly(ethylene glycol)-block-brush poly(l-lysine) polymers.