FIG. 3.

Southern hybridization analysis of genomic DNAs isolated from mycobactin mutant strains LUN8 and LUN9 that were digested with PstI, SmaI, and SacI. A ³²P-labeled HindIII/PstI internal fragment of IS6100 was used as the probe, and pCG79 was the vector control. The origin of the PstI-generated bands is shown in Fig. 5. Molecular size standards are indicated at the left.