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Southern blot analysis of M106 and pM802. The chromosomal DNA of M106 (SopEΦsopE::aphT lysogen) and plasmid pM802 were digested with EcoRV (E) and HindIII (H) and hybridized with the entire pM802 plasmid as a probe. White dots indicate DNA fragments identical in size in M106 and pM802.
