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Effect of ferrisiderophores on of HL-60 iron acquisition from NTA. Shown is the mean and standard error of the mean (n = 4) concentration of cell-associated 59Fe following incubation at the defined time points, in the presence of [59Fe]NTA, of HL-60 cells which had first been preincubated with buffer only (○), 300 μM ferripyoverdin (◊), 100 μM ferripyochelin (▿), 100 μM Ga(NO3)3 (□), or 100 μM FeNTA (▵, single experiment) for 30 min prior to the addition of [59Fe]NTA.
