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Quercitrin inhibits the expression of T3SS effectors and SPI-1 gene. (A) The effect of quercitrin on the expression of T3SS effectors SipA and SipC were detected by Western blot. (B) Quantitative analysis of the expression levels of effectors with Image J. (C,D) The activity of β-galactosidase was measured in cultures of S. Typhimurium expressing hilA::lacZ (JS749) and sopA::lacZ (JS751). * p < 0.05, ** p < 0.01 compared to the untreated group.
