Results 211 to 220 of about 8,797 (254)
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Immunity of Lysogenic Bacteria
Nature, 1956BACTERIAL virus (phage), in its symbiotic phase (prophage), renders the host bacterium lysogenic, and confers on it immunity against lysis by free phage particles of the homologous type, whether temperate or virulent in character. Hyper-virulent mutants, which are rare, may be exceptions to this rule.
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Lethal lysogenization by coliphage lambda
Virology, 1976Abstract Mutants of lambda insensitive to epistatic replication inhibition by repressor ( ri c ) were studied during lysogenization of sensitive host cells. These mutants establish defective complexes which neither lyse nor multiply as lysogens.
M, Ohashi, W F, Dove
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Lysogenization by bacteriophage lambda
Molecular and General Genetics MGG, 1973An easy and sensitive way of measuring the proportion of E. coli cells which are lysogenized by lambda phage or lambda mutants has been devised. With this assay it was possible to analyse the lysogenic response as a function of the average phage input per cell.
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Modelling the stability of Stx lysogens
Journal of Theoretical Biology, 2007Shiga-toxin-converting bacteriophages (Stx phages) are temperate phages of Escherichia coli, and can cause severe human disease. The spread of shiga toxins by Stx phages is directly linked to lysogen stability because toxins are only synthesized and released once the lytic cycle is initiated.
Evans, Thomas +2 more
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Lysogenization by satellite phage P4
Virology, 1981Abstract Satellite phage P4 attaches to the E. coli K-12 chromosome at a preferred site near 96 min. The attachment site on the P4 genome is 31.4–36.5% from the left cohesive end, which has been redefined as the end with the same base sequence as the P2 helper phage left end. The P4 int gene is in the region from 27.5 to 31.4%. Immunity-sensitive
R, Calendar +7 more
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Abortive lysogenization of bacteriophage lambda b2 and residual immunity of non-lysogenic segregants
Journal of Molecular Biology, 1967When Escherichia coli infected with λb2 at a high multiplicity was incubated, the phage is transmitted unilinearly to the descendants, and non-lysogenic cells are segregated. The non-lysogenic cells are immune for about four generations after segregation.
T, Ogawa, J, Tomizawa
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λ Lysogens of E. coli reproduce more rapidly than non-lysogens
Nature, 1975THE evolutionary basis for the integration of phage DNA into bacterial chromosomes (lysogeny1,2) is not understood. A generally accepted explanation is that when the bacterial population is large and growing well, the phages prefer the lytic pathway since they can multiply without elimination of all host bacteria.
G, Edlin, L, Lin, R, Kudrna
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Phages of lysogenic Thermoactinomyces vulgaris
Archiv f�r Mikrobiologie, 1969Two phages isolated from Thermoactinomyces vulgaris multiplied optimally at 55–60°, and were inactivated at 80°. The two isolates had similar growth characteristics, host-range, serology and morphology. Tadpole-shaped with an elongated head, they resemble other actinophages, with long tail lacking contractile sheath and they seem specific to T ...
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Lysogenic Strains of Lactic Streptococci
Nature, 1949DURING the propagation of starter cultures of lactic streptococci for cheese-making, the persistent appearance of phage in the bulk starter under certain conditions, after all known precautions had been taken against phage contamination, indicated that the presence of lysogenic strains was the probable explanation for the presence of bacteriophage.
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