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 A new cell mitosis mystery has been revealed through first-ever, high-resolution, 3D images of a cell nucleus undergoing division. The technique employs a new method for slicing cell samples and powerful electron cryotomography (ECT). Image samples undergo plunge freezing, trapping the cell samples in a near-native state within a layer of glasslike ice. Experiments show a puzzling discovery: One of the characteristic steps of mitosis is significantly different in some cells.
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