We report on a significant difference between the published nucleotide sequence of the Escherichia coli K12 histidine operon and our sequencing results repeatedly obtained from a number of different E. coli K12 strains. The discrepancies include 39 base-pair changes and one addition located predominantly in the proximal portion of the operon. Our data also suggest that neutral and near-neutral mutations do not accumulate to a significant extent in the histidine operon of E. coli strains harbouring strong mutator alleles.
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Nara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, JapanNara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan
Nomura, Wataru
Nakayashiki, Toru
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Nara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, JapanNara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan
Nakayashiki, Toru
Aref, Walid G.
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Purdue Univ, Dept Comp Sci, W Lafayette, IN 47907 USANara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan
Aref, Walid G.
Bochner, Barry R.
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Biolog Inc, Hayward, CA 94545 USANara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan
Bochner, Barry R.
Conway, Tyrrell
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Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USANara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan
Conway, Tyrrell
Gribskov, Michael
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Purdue Univ, Dept Biol Sci, W Lafayette, IN 47907 USANara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan
Gribskov, Michael
Kihara, Daisuke
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Purdue Univ, Dept Comp Sci, W Lafayette, IN 47907 USA
Purdue Univ, Dept Biol Sci, W Lafayette, IN 47907 USANara Inst Sci & Technol, Grad Sch Biol Sci, Ikoma, Nara 6300101, Japan