TABLE 1.

Transcription of the SPI-1 regulon in S. Paratyphi A and S. Typhimurium^a

^aGene tags in S. Typhimurium LT2 are shown in the first column. STM and SPA columns represent averaged FPKM (fragments per kilobase per million reads) values on a log₂ scale for SPI-1 genes and rpoD as a reference control assayed from two independent biological replicates. RNA was extracted from S. Typhimurium SL1344 (STM) and S. Paratyphi A 45157 (SPA) cultures grown to late logarithmic phase at 37°C under aerobic conditions (LLA) and from cultures grown to the stationary phase under microaerobic conditions (SMA) as explained in Materials and Methods. Log₂ FC represents the log₂ fold change of the gene expression in SPA compared to that in STM. Transcription data are color-coded such that higher levels of transcription are colored in shades of blue and lower transcription is shaded in red.