Location of the ompT gene relative to that of appY on the physical map of the Escherichia coli chromosome

Results concerning the precise location of the ompT gene (encoding the outer membrane protease OmpT) on the Escherichia coli chromosome were obtained which disagree with published restriction sites in the gene. It is shown that the gene, together with appY, is present on a 3.075 PstI fragment, encompassing positions 596–598 of the E. coli physical map.