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J Gen Microbiol. 1986 Jan;132(1):61-70.

Characterization of the ColE9-J plasmid and analysis of its genetic organization.

Abstract

We have determined the restriction and functional map of the ColE9-J plasmid. By sub-cloning and transposon mutagenesis we have shown that the ColE9imm gene and the ColE5imm gene present on the ColE9-J plasmid are located on separate EcoRI fragments. Using an expression vector we have demonstrated the presence of two lys genes on the ColE9-J plasmid, both of which are dependent upon the colicin E9 structural gene promoter. Promoter mapping studies imply that the colicin E9 structural gene and the ColE5imm gene are transcribed in the same direction, but that the ColE9imm gene is transcribed in the opposite orientation.

PMID:
3011960
DOI:
10.1099/00221287-132-1-61
[Indexed for MEDLINE]
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