FIG. 3.
Electron micrographs of cell clusters in a late-logarithmic-phase culture of Methanomethylovorans hollandica DMS1T grown on methanol. (A) Scanning electron micrograph clearly showing large aggregates of cell clusters consisting of two to four irregular coccoid cells. (B) Transmission electron micrograph of a freeze-etched sample. Bar, 1 μm.