Novel mutations of Escherichia coli that produce recombinogenic lesions in DNA. V. Recombinogenic plasmids from arl mutants of Escherichia coli are unusually sensitive to nuclease S1 and partially deficient in cytosine methylation at C-C-(A/T)-G-G sequences.

5-Methylcytosine Base Sequence Chromatography, High Pressure Liquid Cytosine/analogs & derivatives,analysis DNA Restriction Enzymes/metabolism DNA, Bacterial DNA, Recombinant Electrophoresis, Agar Gel Endonucleases/metabolism Escherichia coli/genetics Mutation Plasmids Recombination, Genetic Single-Strand Specific DNA and RNA Endonucleases

DNA, Bacterial DNA, Recombinant 5-Methylcytosine Cytosine Endonucleases DNA Restriction Enzymes Single-Strand Specific DNA and RNA Endonucleases