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Physical map of the lysis plasmid pBV E cat. Gene E, under transcriptional control of the temperature-sensitive repressor; rrBT1T2: ribosome rrnB gene providing translation stop signal terminator sequence; pro: the regulating sequence including promoter; cat: chloramphenicol acetyl transferase gene; ori: replication origin; cIts857: restraining gene of lambda bacteriophage adapted to heat induced expression.
