techcannon:

A mitosis mystery solved: How chromosomes align perfectly in a dividing cell

“Like Agatha Christie’s Hercule Poirot and Arthur Conan Doyle’s Sherlock Holmes, Tomomi Kiyomitsu used his keen powers of observation to solve a puzzle that had mystified researchers for years: in a cell undergoing mitotic cell division,”

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“People have been looking at these proteins and players in mitosis for decades, and no one ever saw what Tomomi observed,” says Whitehead Institute Member Iain Cheesema”

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“As Kiyomitsu watched mitosis unfold in symmetrically dividing human cells, he noticed that when the spindle oscillates toward the cell’s center, a partial halo of the protein dynein lines the cell cortex on the side farther away from the spindle. As the spindle swings to the left, dynein appears on the right, but when the spindle swing to the right, dynein vanishes and reappears on the left side.”