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. 2017 Mar 10;12(3):e0173454. doi: 10.1371/journal.pone.0173454

Fig 5. Ability of recombinant endotoxin-free gp41 to induce IL-10.

Fig 5

a) Determination of the endotoxin content of the gp41 preparation (left) and its ability to induce IL-10 in isolated PBMCs (right) from donor 1. b) Determination of the endotoxin content of the gp41 preparation (left) and its ability to induce IL-10 in isolated PBMCs (right) from donor 2. Although identical amounts of antigen with comparable endotoxin content were applied in both assays, IL-10 induction was not consistently detected.