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Genetic map of pHPC38 carrying the PhiX174 gene E lysis cassette under control of the temperature-sensitive (ts) λ repressor binding to the λ promoter/operator region (left). The lysis cassette is carried by the pHel2 shuttle vector with replication functions for E. coli and H. pylori (right). catGC, chloramphenicol acetyltransferase gene.
