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. 2014 Aug 27;11:152. doi: 10.1186/1743-422X-11-152

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© He et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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CD4 surface expression in SIV-infected C8166 T cell line determined by FACS analysis. CD4 surface expression on uninfected (upper panel) and chronically infected (lower panel) C-8166 cells as determined by flow cytometry. Blue lines depict unstained control samples, red lines staining with an antibody directed against CD4. Chronically infected cells display a slightly higher auto-fluorescence and only a little CD4 expression compared with uninfected cells.