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Southern blot analysis of pulsed-field gels electrophoresed with DNA from CN1183, CN3842, CN4003, JGS1902, and JGS4138. The Southern blot was first hybridized with a DIG-labeled, etx-specific probe (A) and then stripped and reprobed with a DIG-labeled, lam-specific probe (B). The positions of molecular size markers are indicated on the left.
