Figure 3
From: Common origin of plasmid encoded alpha-hemolysin genes in Escherichia coli
Map of the hlyR - hlyC region of representative plasmids of groups 1, 2 and 3. Genetic map of the corresponding regions from hlyR to hlyC of α-hly determinants from plasmids representing groups 1-3. A) pEO9, (strain 84-2195) B) pEO11, (84-3208); and C) pEO853 (CB853). The positions of PCR-primers used for identification and nucleotide sequencing are indicated as leaders carrying the primer designations (Table 2). Regulatory sequences inside the hlyR gene (A, B and OPS) are shown as filled ballons. "phly152" is a stretch of non-coding DNA showing strong homology to corresponding regions in the α-hly plasmid pHly152.