Summary
Primary cultures of chick embryos have been carried beyond the 50th passage in cell culture media containingN-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid (HEPES). The doubling, potential, was found to decrease twice as fast for chick cells as it did for WI-38 human cells.
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Massie, H.R., Baird, M.B. & Samis, H.V. Prolonged cultivation of primary chick cultures using organic buffers. In Vitro 9, 441–444 (1974). https://doi.org/10.1007/BF02615996
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DOI: https://doi.org/10.1007/BF02615996