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Transcriptional regulation of the LEE: composite model based on evidence from three attaching and effacing strains (the EHEC-1 and EPEC-1 lineages and C. rodentium). The lines that end with arrowheads indicate positive influences; the lines that end with crossbars indicate negative influences. For references see the text. NE, norepinephrine and other catecholamines; QS, quorum sensing.
