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. 2019 Oct 23;13:78. doi: 10.1186/s13036-019-0206-z

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© The Author(s). 2019

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Production of influenza H7N9-TW VLPs in the baculovirus expression vector system. cDNAs of the HA, NA, and M1 proteins were derived from the sequences of the Influenza A/Taiwan/1/2013 (H7N9) virus strain by polymerase chain reaction (PCR). The amplified DNA fragments were subcloned into the corresponding sites in a baculovirus expression vector