Fig. 2From: TetR-family transcription factors in Gram-negative bacteria: conservation, variation and implications for efflux-mediated antimicrobial resistancePatterns of TFTR presence/absence across Escherichia and Salmonella strains. TFTR presence/absence across strains of Escherichia (a) and Salmonella (b). Colours of squares indicate proposed function of TFTR, with darker colours indicating presence of the gene in the given strain and lighter colours indicating the gene is absentBack to article page