TIME-SEQUENCE OF RECOVERY OF IRRADIATED ESCHERICHIA COLI
نویسندگان
چکیده
منابع مشابه
Dark - Recovery Processes in Escherichia coli Irradiated with Ultraviolet Light
Mutants of Escherichia coli K-12 unable to excise pyrimidine dimers from their deoxyribonucleic acid (DNA) because of a uvr mutation show a higher survival when plated on a minimal salts medium after exposure to ultraviolet radiation than when plated on a complex medium such as nutrient agar containing yeast extract. This response has been called minimal medium recovery (MMR). Recovery of uvr m...
متن کاملPostirradiation responses of ultraviolet irradiated Escherichia coli.
The phenomena of photoreactivation (Jagger, 1958) and dark reactivation (Ellison, Erlanger, and Allen, 1955; Heinmets et al., 1954; Roberts and Aldous, 1949), while raising questions concerning the mechanism of action of ultraviolet irradiation (Zelle and Hollaender, 1955; Kimball, 1957), have also been useful tools for the study of radiation effects on living systems. Many factors which alter ...
متن کاملDark-recovery processes in Escherichia coli irradiated with ultraviolet light. 3. Effect of rec mutations on recovery of excision-deficient mutants of Escherichia coli K-12.
Mutants of Escherichia coli K-12 unable to excise pyrimidine dimers from their deoxyribonucleic acid (DNA) because of a uvr mutation show a higher survival when plated on a minimal salts medium after exposure to ultraviolet radiation than when plated on a complex medium such as nutrient agar containing yeast extract. This response has been called minimal medium recovery (MMR). Recovery of uvr m...
متن کاملDark reactivation in ultraviolet irradiated Escherichia coli.
Reversal of the lethal effect of ultraviolet radiation on microorganisms by a variety of treatments has been demonstrated with two essentially different plating techniques. Cells may be plated immediately after irradiation, in which case reactivation occurs on the agar plate. By employing such a plating procedure, reactivation has been accomplished through the use of heat (Anderson, 1951), acet...
متن کاملDark recovery processes in Escherichia coli irradiated with ultraviolet light. II. Effect of uvr genes on liquid holding recovery.
The uvr mutations of Escherichia coli K-12 decrease the ability of cells to survive ultraviolet light (UV), to excise pyrimidine dimers from their deoxyribonucleic acid and to reactivate bacteriophage exposed to UV. The rec mutations decrease the ability of the cells to survive UV and to undergo genetic recombination. Certain rec mutations, including recA1, rec-12, recA13, and rec-56, are neces...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1963
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.86.5.1137-1138.1963