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. 2015 Jul 8;10(7):e0131894. doi: 10.1371/journal.pone.0131894

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© 2015 Jin et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 2 — A) Large scale purification and identification of recombinant CCR5-T4L. Recombinant CCR5-T4L was expressed in E. coli. The pET-20b expression vector was transformed into Rosetta 2 (DE3) golden BL21 pLysS cells and analyzed using Coomassie brilliant blue R-250. Lane M: protein marker; lane 1: uninduced bacterial lysate; lane 2: IPTG-induced bacteria lysate; lane 3: small amount of soluble fraction purified on a Ni-nitrilotriacetic acid (NTA) histidine-binding column; lane 4: small amount of membrane fraction purified using a Ni-nitrilotriacetic acid (NTA) histidine-binding column; lane 5: large amount of soluble fraction purified by fast protein liquid chromatography (FPLC) using an AKTA purifier; lane 6: large amount of membrane fraction purified by fast protein liquid chromatography (FPLC) using an AKTA purifier. B and C) Western blot analyses using the anti-6×His tag monoclonal or anti-human CCR5 monoclonal antibodies (3A9).