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Image SK2802 (HaCaT Culture Cells)Immunofluorescence light micrograph of HaCaT daughter cells that have resulted from one cell dividing into two (mitosis). The nuclei, which contain the cell’s genetic information, are red. The yellow strands are microtubules, which are involved in cell division. HaCaT cells are human skin cells (keratinocytes) that have been transformed (mutated) to be immortal. They have unlimited growth potential, but unlike other immortal cell lines they are not tumorigenic, meaning non-tumor forming. They grow in an orderly fashion and retain all the structural and functional features of human skin. HaCaT cells are grown in the laboratory and are used in research, including wound healing research. Magnification: x980 when printed 10cm wide.