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A chromosome (blue) imaged during cell replication. The chromosome is duplicated, and protein strands called spindle fibers (red) are attached to the chromosome copies to pull them apart, so that each ‘daughter cell’ gets one copy. The spindle fibers attach to the chromosomes due to the centromere. (Credit: Zeiss Microscopy/Flickr) Three fruit flies. Kei Nakamura, Antoine Snijders and Lieselotte Obst-Huebl (from left) at the BELLA laser facility aligning cartridges containing human cells in the proton beam path. This setup enabled measurements of the biological effects of laser-driven protons. Amy Herr Portrait of Jay Keasling, a person with short gray beard, wearing green rectangular glasses and light shirt with top bottoms open. green and red light patterns against a black background Portrait of Aindrila Mukhopadhyay, a smiling person with long black and straight hair, pulled back on top and falling over shoulders. Photographed in front of dark backdrop.

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