FIG. 4.

Amounts of ⁵⁹Fe³⁺ taken up by wild-type (WT) and mutant (M1 to M10 [Fig. 1]) cells. Cells grown in complete medium (A) and iron-deprived cells (B) were incubated with 10 μM ⁵⁹FeCl₃ for 5 min in the light in the presence of 1 mM Ferrozine.