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. 2016 Jul 28;11:350. doi: 10.1186/s11671-016-1558-7

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — Structural basis of conjugation. a Non-covalent ligation between Vhh-His and nickel-chelating lipid 18:1 DGS-NTA-Ni. b Covalent ligation between Vhh-cys and malDSPE-PEG₂₀₀₀ lipid