DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
Newly divided HeLa cells. Confocal light micrograph showing four newly divided HeLa cells. The nuclei (pink) and microtubules (green) can be seen, as can the cytoplasmic bridges still connecting the daughter cells. 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. Magnification: x1000 when printed 10 centimetres wide.
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