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E. coli cells depleted of Ffh or SecE produce endoplasmic membrane networks as observed by electron microscopy. Representative micrographs are shown as follows: (a) Nondepleted cells; (b) FtsY-depleted cells; (c and d) Ffh-depleted cells; and (e and f) SecE-depleted cells. Bars, 100 nm. Arrowheads in c, d, and f indicate membrane-associated ribosomes.
