Bacterial conjugation is an efficient and sophisticated mechanism of DNA transfer among
bacteria. While mobilizable plasmids only encode a minimal MOB machinery that allows …

INTRODUCTION Escherichia c (li is usually considered to be an opportun-istic pathogen
which constitutes a large portion of the normal intestinal flora of humans. This organism can …

We cloned the DNA containing the Escherichia coli hemolysin determinant on a small, high-
copy plasmid. We generated plasmids containing fragments of this DNA and used them …

Among a large collection of hemolysis-negative mutants obtained by mutagenesis of the Hly
plasmid pHly152 with Tn5, we have isolated two classes of mutants which are defective in …

The F plasmid is the foremost representative of a large group of conjugative plasmids,
prevalent in Escherichia coli, and widely distributed among the Enterobacteriaceae. These …

The complete sequence of the plasmid pHly152-encoded hemolysin (hly) determinant of
Escherichia coli is presented and compared with a recently sequenced chromosomal hly …

We performed osmotic protection experiments to test the hypothesis that the Escherichia coli
hemolysin forms a discrete-size pore in erythrocyte membranes. The effects of toxin …

The alpha-hemolytic Escherichia coli strain PM152 harbors three transmissible plasmids,
which have molecular weights of 65 X 10 (6)(pA152), 41 X 10 (6) pHly152), and 32 X 10 …

Plasmid hemolysin (hly) determinants have been shown previously to comprise three
cistrons (hlyA, hlyB, hlyC), coding for the synthesis and transport of hemolysin. Using …

This chapter provides an overview of plasmid classification systems and then describes the
various mechanisms of plasmid‐mediated resistance to antibacterial agents. The major …