Transcriptional regulation of sulfate genes in B. pertussis strain B1920 (ptxP1) and B1917 (ptxP3).

Abbreviations; C, cytoplasmic; Cm, cytoplasmic membrane; FC, fold change; HSR, high sulfate repressed; ORF, open reading frame; P, periplasmic; Un, unknown. The columns with fold change difference show the ratio of absolute expression (ptxP3/ptxP1) under low (0 mM), intermediate (5 mM), and high (50 mM) sulfate conditions. Asterisks indicate a statistically significant difference. † indicates that the gene was excluded because signal intensity was ≤500 in both the conditions compared. Genes above the dotted line are genes that annotated as genes involved in sulfate metabolism.