FIG 2.

Roles of AcuK and AcuM in iron uptake and extracellular siderophore activity. (A) Relative incorporation of ⁵⁵Fe after 1 h by washed germlings of the indicated strains. (B) Extracellular siderophore activity of the indicated A. fumigatus strains measured after 40 h of incubation. Results are means ± SDs from 3 biological replicates, each tested in triplicate. *, P < 0.01 compared to the wild-type strain; †, P < 0.04 compared to the ΔacuK+acuK complemented strain; ‡, P < 0.01 compared to the ΔacuK mutant.