Coloured TEM of E. coli bacteria dividing

Coloured TEM of E. coli bacteria dividing

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Credit: DR KARI LOUNATMAA/SCIENCE PHOTO LIBRARY

Caption: E. Coli bacteria dividing. Transmission electron micrograph of the division zone between two new Escherichia coli bacteria showing the cells undergoing binary fission. The green area in each cell is cytoplasm, which is bound by a cytoplasmic membrane. Outside this is the bacterial cell wall (orange), which consists of a rigid inner peptidoglycan layer and an outer membrane. The attached bands across the division zone represent the incomplete peptidoglycan layers of the two daughter cells. The constricting outer membrane has yet to bridge the gap between the cells. E. coli is a normal inhabitant of the human gut. Magnification x142,800 at 6x7cm size. Magnification: x400,000 at 10x8 inch size.

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Keywords: bacteria, bacterial, bacteriology, bacterium, binary, binary fission, cell division, cell wall, dividing, division, e. coli, electron micrograph, escherichia coli, fission, formation, micro-organisms, microbe, microbes, microbiology, peptidoglycan, synthesis, tem, transmission, type

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