DAVID BECKER / SCIENCE PHOTO LIBRARY DAVID BECKER / SCIENCE PHOTO LIBRARY
Culture cell. Confocal light micrograph of a 3t3 (mouse fibroblast) cell in culture. The nucleus is blue. Protein fibres making up the cell's cytoskeleton are red and green. The cytoskeleton is a network of structural proteins, such as actin and tubulin, that supports the cell's organelles and other internal structures. Magnification: x1000 when printed 10cm wide.
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