Compilation of DNA sequences of Escherichia coli (update 1990).

We have compiled the DNA sequence data for E.coli available from the GENBANK and EMBL data libraries and over a period of several years independently from the literature. This is the second listing replacing and increasing the former listing roughly by one third. After deletion of all detected overlaps a total of 1 248 696 individual bp is found to be determined till the beginning of 1990. This corresponds to a total of 26.46% of the entire E. coli chromosome consisting of about 4,720 kbp. This number may actually be higher by some extra 2% derived from the sequence of lysogenic bacteriophage lambda and various insertion sequences. This compilation is now available in machine readable form from the EMBL data library.