Chemistry: molecular biology and microbiology – Spore forming or isolating process
Patent
1991-07-15
1993-06-15
Lacey, David L.
Chemistry: molecular biology and microbiology
Spore forming or isolating process
435 703, C12N 508, C12P 2100
Patent
active
052197522
ABSTRACT:
Adherent 293 human kidney cells are continuously cultured in suspension in serum-free medium. Fresh medium is fed into a culture vessel and spent medium is withdrawn from the vessel. The 293 cells are maintained in small aggregates in suspension at a density of at least 3.times.10.sup.6 cells/ml for 30 days. The formation of large cell clumps is prevented by maintaining the concentration of calcium in the serum-free medium at 0.002 mM to 0.3 mM.
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Eagle, Amino Acid Metabolism in Mammalian Cell Culture Science, vol. 130, pp. 432-437 1959.
Nagafuchi, et al., Transformation of Cell Adhesion Properties by Exogenously Introduced E-Cadherin cDNA, Nature, vol. 329, pp. 341-343 24 Sep. 1987.
Takazawa Yoshiharu
Tokashiki Michiyuki
Elliott George C.
Lacey David L.
Teijin Limited
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