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. 2018 Feb 15;11(2):301. doi: 10.3390/ma11020301

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Protein binding efficiency of GR NPs and GR-PEI NPs. (A) Protein binding ability was determined with different NP:Protein ratio. (B,C) Different weight ratio of bovine serum albumin (BSA) was interacted with GR NPs or GR-PEI NPs for 1 h. The variation of particle size and zeta potential were measured by DLS spectroscopy. The polydispersity index (PDI) of each group was less than 0.1. The representative results are shown as M ± SD (n = 3). Each bar represents the means of three determinations ±SD.