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. 2016 Feb 3;13:9. doi: 10.1186/s12977-016-0240-6

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© Wang et al. 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. 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. 3 — Alteration of the transcription factor binding motifs in the LTR U3 region. Sequences of 134 clones of the LTR from seven EIAV strains were randomly isolated from PCR-amplified fragments and analyzed. NRE indicates the negative regulation element and EHR indicates the enhancer region. The boxes define transcription factor binding sites. The numbers at the left end of the gray lines indicate the detected clones of each strain. The numbers in parentheses refer to the numbers of clones that contain the indicated transcription factor binding site