A stem cell line is a family of constantly dividing cells, the product of a single group of stem cells. They are obtained from human or animal tissues and can replicate for long periods of time in vitro ("within glass"; or, commonly, "in the lab", in an artificial environment). They are frequently used for research relating to embryonic stem cells or cloning entire organisms.
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Famous quotes containing the words stem, cell and/or line:
“Ignorance, the root and stem of all evil.”
—Plato (c. 427–347 B.C.)
“In America all too few blows are struck into flesh. We kill the spirit here, we are experts at that. We use psychic bullets and kill each other cell by cell.”
—Norman Mailer (b. 1923)
“This is something that I cannot get over—that a whole line could be written by half a man, that a work could be built on the quicksand of a character.”
—Karl Kraus (1874–1936)