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HeLa-DC-SIGN and DCs cannot phagocytose the deep rough mutant of E. coli and the E. coli expressing O antigen. The adherence (A) and internalization (B) of E. coli K-12 CS180, its derivatives, CS2429 and CS1861, E. coli UPEC GR-12 and its derivative by HeLa, HeLa-DC-SIGN, and DCs (C) were performed as described in the legend to Fig. 2. The number of phagocytosed bacteria was determined by the recovery of bacteria from the gentamicin protection assay.
