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Both STM1344 and STM1697 are involved in flagellar control during Salmonella infection (A–D). The transcription levels of flagellar genes (flhD, fliA, fliZ, and fliC) in WT, Δstm1344, and Δstm1697 strains before and after they entered RAW264.7 cells were detected by RT-qPCR. These experiments were performed as three replicates, and the mean values are presented. ***, P < 0.001; **, P < 0.01; *, P < 0.05.
