DR TORSTEN WITTMANN / SCIENCE PHOTO LIBRARY DR TORSTEN WITTMANN / SCIENCE PHOTO LIBRARY
Dividing cell. Differential interference contrast (DIC) light micrograph of a cell (lower left) in the metaphase stage of mitosis (cell division). The cells nuclei are stained with fluorescent dye. The non-dividing cell nuclei are blue. In the dividing cell, the genetic material (chromosomes) is red. During metaphase, the chromosomes (which contain DNA) form this line (the metaphase plate). They will be dragged apart (left and right) by structures called microtubules (not stained here). This will form the two genetically identical daughter cells that are the end product of mitosis. These are PtK1 epithelial kidney cells. Magnification: x670 when printed 10cm wide.
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