大肠杆菌分裂照片
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下一篇 2013-01-29 20:51:28
Initial divisions of three Escherichia coli K-12 cells leading to
microcolony formation on agar-coated slides show the development from a
single cell to a characteristic four-cell array.
Following the first division, cell elongation became
asymmetric, so that the two daughter cells elongated preferentially
towards each other, displacing their inside poles and continuing to
elongate alongside each other until the four poles were aligned.
Septation and division occurred during the elongation process so that a
characteristic four-celled structure resulted after somewhat less than 2
h of incubation.
Selected video frames were photographed off the
monitor and are arranged in sequential order from top to bottom to show
the development. The numerals at the left of each panel give the time of
the video frame. (hours:minutes:seconds). (The exact magnifications of
these figures were not determined, but they are on the order of x2,000).
James Shapiro and Clara Hsu, Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Ill., USA
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