DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
HeLa cells. Confocal light micrograph of two HeLa cells. The cell nuclei, which contain the cells' genetic information, are brown. Mitochondria, which produce energy for cells, are pink. Actin (protein) filaments, which form part of the cytoskeleton, are green. The cytoskeleton maintains the cells' shape, allows some cellular mobility and is involved in intracellular transport. HeLa cells are a continuously cultured cell line of human cancer cells. They are immortal and so thrive in the laboratory. HeLa cells are widely used in biological and medical research.
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