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. 2016 Apr 22;8(4):161. doi: 10.3390/polym8040161

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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) Poly(organo)phosphazenes 2–4 with the tetrapeptide linker GFLG and Jeffamine M-1000 coupled to the polyphosphazene backbone. (B) Poly(organo)phosphazene 5 loaded with imiquimod via the tetrapeptide linker GFLG and Jeffamine M-1000 coupled via a glycine spacer to the polyphosphazene backbone. The combinations of the two different side chains are statistically distributed.