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Effect of EPEC type III structural proteins on thiamin uptake. Caco-2 cells were infected with EPEC or with one of the structural protein mutant strains of ΔespA, ΔespB, and ΔespD (100 MOI for 1 h along with 6 h postincubation) followed by measurement of [3H]thiamin uptake. Values are means ± SE of 3–4 separate uptake determinations. *P < 0.05 compared with control.
