Defective F pili and other characteristics of Flac and Hfr Escherichia coli mutants resistant to bacteriophage R17
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چکیده
منابع مشابه
Studies on sex pili: mutants of the sex factor F in Escherichia coli defective in bacteriophage-adsorbing function of F pili.
Ultraviolet irradiation or nitrosoguanidine treatment of Escherichia coli K-12 strain JE3100 (F'(8)/fla pil) led to the isolation of six mutants defective in F pili function. The defects were shown to be caused by mutations in the F factor. The mutants retained conjugal fertility, although they were less efficient than parental F'(8) strain, and continued to synthesize F pili. Three of the muta...
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In order to study the relationship between hrmolysin / ashesins of Escherichia coli and occurrence of urinary tract infection ( UTI), the capacity of 570 isolated E.coli in agglutination of human or guinea pig erythrocytes and their lysis were tested. These isolates were obtained from the urine of patients with bacteriuria and from the stool of healthy people. Three patterns of hemagglutinat...
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Bacteriophage-resistant mutants isolated and classified in a previous study were examined for alterations in their lipopolysaccharide (LPS) composition, and properties likely to be affected by alterations in LPS composition were studied. It was found that many of the mutants of the Ktw (K2-resistance), Ttk (T2, T4, or K19 resistance), Bar (bacteriophage), Wrm (wide-range mutants), and miscellan...
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متن کاملUltrastructure of Escherichia coli cells infected with bacteriophage R17.
Franklin, Richard M. (Institut de Recherches sur le Cancer, Villejuif, Seine, France), and Nicole Granboulan. Ultrastructure of Escherichia coli cells infected with bacteriophage R17. J. Bacteriol. 91:834-848. 1966-Ultrastructural changes in Escherichia coli cells infected with ribonucleic acid (RNA) bacteriophage R17 were studied under conditions of one-step growth. No morphological alteration...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1979
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.140.2.525-531.1979