FIG. 1.

Plasmid pMV158 and its ssoA. (Top) Schematic map of pMV158 with some of the plasmid-encoded genes, relevant restriction sites (coordinates of cleavage sites in parentheses), and the relative positions of the dso and the two ssos (ssoU and ssoA). The position of the small EcoRI fragment (deleted in plasmid pLS1) is indicated. (Bottom) Nucleotide sequence of the plasmid ssoA between restriction sites AflII and NcoI (underlined). The two conserved sequences, RS_B and CS-6, are boxed. The 3′ ends of the deletions in plasmids pLS1Δ13 and pLS1Δ14 are indicated (arrows).