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. 1999 Jul;65(7):2926–2933. doi: 10.1128/aem.65.7.2926-2933.1999

FIG. 5.

FIG. 5

Fe(III) and Cu(II) reduction by T-22 culture filtrates. The amount of Fe(II)-BPDS or Cu(I)-BCDS was determined spectrophotometrically by the increase of the absorbance (540 and 492 nm, respectively) after 4 h of incubation at 37°C (for more details, see the text).