DAVID BECKER / SCIENCE PHOTO LIBRARY DAVID BECKER / SCIENCE PHOTO LIBRARY
Cultured cells. Confocal light micrograph of cultured cancer cells. The cell nuclei are bright blue. Red actin filaments are seen in the cell cytoplasm (dark blue). Actin is a structural protein that forms part of the cytoskeleton of a cell. The cytoskeleton provides support for organelles. Magnification unknown.
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