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Effect of pressure on RNA configuration of E. coli J1. Fluorescence photomicrographs of exponential- and stationary-phase cells stained with acridine orange are shown. (A) Exponential-phase cells treated with 200 MPa for 8 min (0.02% viable cells); (B) stationary-phase cells treated with 600 MPa for 8 min (0.01% viable cells). Bars, 2 μm. The arrow indicates stained material released from the cell.
