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(A) Schematic representation of the E. coli chromosomal region of the cpxRA two-component system, the gene encoding the E. coli HtrA-like protease (degP) and adjacent genes. Schematic representacion of the B.subtilis (B) and S. lividans (C) chromosomal regions of the cssRS two-component system, the HtrA-like proteases encoding genes and adjacent genes.
