A mutation in the hha allele results in a large increase in the production of intracellular as
well as extracellular haemolysin in Escherichia coli cells harbouring the haemolytic …

A sequence (hly R) of about 600 bp which enhances the expression of hemolysin (HlyA)
more than 50-fold was identified in the plasmid pHly152-specific hemolysin (hly) …

Transposon mutagenesis was used to isolate two Escherichia coli mutants which express
very large amounts of haemolysin when carrying the multicopy plasmid pANN202-312. E …

We have previously reported the secretion of a 107K polypeptide into the medium from a
haemolytic E. coli K12 strain (Mackman and Holland 1984a). In addition, we demonstrated …

As a first approach towards studying the regulation of hemolysin synthesis in Escherichia
coli, we have fused lacZ into the four hly genes (hlyC, hlyA, hlyB a and hlyB b) using the Mu …

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 …

The transcriptional organization of the Escherichia coli hemolysin genes (hlyCABD)
encoded by pSF4000 was examined. The use of different hemolysin gene-specific …

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 have recently reported the secretion of a 107K polypeptide by an E. coli strain containing
the haemolytic plasmid pHly167 (Mackman and Holland 1984). In this paper we show that a …

The genetic determinant of the α-hemolysin encoded by plasmid pHly152 has been cloned
in both orientations in plasmid pBR322 giving rise to plasmids pSU157 and pSU158. E. coli …