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(a) Scanning electron microscope of cells grown at ambient temperatures, white arrows denote nodular feature being preserved along previous cell division planes. (b) Scanning electron microscope of cells grown at −15 °C in 18% NaCl and 7% glycerol, encrusted in dense nodular material. (c) Transmission electron microscopy of cross-section of dividing cells grown at −15 °C, noting the outer cell envelope with the nodular crust material in close association with the cell wall.
