Figure 15: TEM photograph of E. coli treated with DMF showing rod shaped cells, normal smooth continuous cell wall (short black arrow) and cell membrane (long black arrow), homogenous Electron-dense cytoplasm (short white arrow), normal electron-lucent region between cell wall and cell membrane (long white arrow). [Specimen fixed in 4F1G solution and double stained with uranyl acetate and lead citrate, scale bar=100 nm].