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Cell culture or tissue culture is the process by ... A cell strain is derived either from a primary culture or a cell line by the selection or cloning of cells having ...
A cell line can be defined as a permanently established cell culture which will propagate forever. Investigators mostly get cell lines from other investigators or from cell banks (such as the American Type Culture Collection) , because its much easier than creating new one. In special cases, investigators are obligated to establish a cell line.
Stem-cell lines are grown and maintained at specific temperature and atmospheric conditions (37 degrees Celsius and 5% CO 2) in incubators. Culture conditions such as the cell growth medium and surface on which cells are grown vary widely depending on the specific stem cell line. Different biochemical factors can be added to the medium to ...
HeLa cells are sometimes difficult to control, because they adapt to growth in tissue culture plates and invade and outcompete other cell lines. Through improper maintenance, they have been known to contaminate other cell cultures in the same laboratory, interfering with biological research and forcing researchers to declare many results invalid.
There are several examples of immortalised cell lines, each with different properties. Most immortalised cell lines are classified by the cell type they originated from or are most similar to biologically 3T3 cells – a mouse fibroblast cell line derived from a spontaneous mutation in cultured mouse embryo tissue.
Human embryonic kidney 293 cells, also often referred to as HEK 293, HEK-293, 293 cells, are an immortalised cell line derived from HEK cells isolated from a female fetus in the 1970s. [ 1 ] [ 2 ] The HEK 293 cell line has been widely used in research for decades due to its reliable and fast growth and propensity for transfection .
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