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Growth of HL-60 and HL-60 variant cells in liquid culture suspension. (A) Cells (0.4 × 106/ml) were seeded and cultured in RPMI 1640 medium supplemented with 10% fetal calf serum. (B) Cells were seeded in serum deprived RPMI 1640 medium. The percentage of viable cells was determined by trypan blue exclusion. Values are the mean ±SD of three experiments.
