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. 2016 Oct 10;21(10):1334. doi: 10.3390/molecules21101334

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© 2016 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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(a) Synthesis approach of HAI-SPDP-bPEI.; (b) Synthesis approach of HAI-SMCC-bPEI. (bPEI: branched polyethylenimine; PEG₄-SPDP: 2-Pyridyldithiol-tetraoxatetradecane-N-hydroxysuccinimide; sulfo-SMCC: sulfosuccinimidyl 4-[N-maleimidomethyl]cyclohexane-1-carboxylate; DTT: dithiothreitol).

(a) Synthesis approach of HAI-SPDP-bPEI.; (b) Synthesis approach of HAI-SMCC-bPEI. (bPEI: branched polyethylenimine; PEG₄-SPDP: 2-Pyridyldithiol-tetraoxatetradecane-N-hydroxysuccinimide; sulfo-SMCC: sulfosuccinimidyl 4-[N-maleimidomethyl]cyclohexane-1-carboxylate; DTT: dithiothreitol).