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. 2012 Jun 13;2:456. doi: 10.1038/srep00456

Figure 4.

Figure 4

TEM image of (a) sparsely attached stAuNPs on an E. coli cell due to lack of sufficient b-Abs, which would also occur when the antigens are not uniformly distributed, and (b) monolayer immunogenic attachment of stAuNPs on an E. coli cell surface. (c) Effect of switching f-Abs off when the bacteria are present in the system on the extent of aggregation at the low end REVC. Red arrow indicates possible conjugation. d) TEM image of stAuNPs aggregation in the presence of E.coli (107 CFU) at 2 μg/400 μL of b-Ab, where the immunogenic attachment is favoured. (e) The role of bacteria switching b-Abs off to increase the extent of aggregation at the high end REVC. (f) TEM image of stAuNPs aggregation in the presence of E.coli (107 CFU) at 5 μg/400 μL of b-Ab, where the aggregation of stAuNPs is favoured.