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Confocal microscope image showing the accumulation of green fluorescent protein in the periplasmic compartment of E. coli mediated by the Tat protein export pathway. Image by Dr Berengere Ize.

Transmission electron micrograph image of E. coli K12 parental strain.

Transmission electron micrograph image of an otherwise isogenic tatC strain.

Confocal fluorescence micrograph showing EGFP-labelled hyphae of Streptomyces scabies 87-22 colonising an Arabidopsis thaliana Col-0 root. Image thanks to J Fyans

Fluorescent microscopy image of E. coli strain depleted for yjeE expression. The purple stain is DAPI (DNA stain) and the red stain is nile red (membrane stain). Image courtesy of Jenny Handford.

Transmission electron micrograph of E. coli cell depleted for yeaZ expression. Image courtesy of Jenny Handford.