Phage and defective phage of strains of Myxococcus

1976 ◽  
Vol 108 (3) ◽  
pp. 271-279 ◽  
Author(s):  
N. L. Brown ◽  
R. P. Burchard ◽  
D. W. Morris ◽  
J. H. Parish ◽  
N. D. Stow ◽  
...  
Keyword(s):  
Defective Phage

Biological and genomic analysis of a PBSX-like defective phage induced from Bacillus pumilus AB94180

2013 ◽  
Vol 159 (4) ◽  
pp. 739-752 ◽  
Author(s):  
Tingting Jin ◽  
Xiaoming Zhang ◽  
Yang Zhang ◽  
Zhongsheng Hu ◽  
Zhengwei Fu ◽  
...  
Keyword(s):  
Bacillus Pumilus ◽  
Genomic Analysis ◽  
Defective Phage

Über einen Defekt des transduzierenden Salmonella-Phagen P 22

1958 ◽  
Vol 13 (8) ◽  
pp. 489-493 ◽  
Author(s):  
Peter Starlinger
Keyword(s):  
Salmonella Typhi ◽  
Free Phage ◽  
Defective Phage

Cells of Salmonella typhi murium transduced by phage P 22 are mostly lysogenic. If the cells are infected at a low multiplicity and superinfection is excluded by antiserum, the transduced cells are not immune and no free phage is found in a culture of these cells. It is concluded that the transducing particle is a defective phage not able to establish lysogeny in the cell.The differences between specialized transduction with phage λ and the transduction with phage Ρ 22 are discussed.

A phage-like bacteriocin of Rhizobium trifolii

1973 ◽  
Vol 19 (3) ◽  
pp. 359-368 ◽  
Author(s):  
E. A. Schwinghamer ◽  
C. E. Pankhurst ◽  
P. R. Whitfeld
Keyword(s):  
Phage Type ◽  
Buoyant Density ◽  
Cesium Chloride ◽  
Close Correlation ◽  
Ultraviolet Absorption Spectrum ◽  
Bacterial Cells ◽  
Rhizobium Trifolii ◽  
Bacteriocin Activity ◽  
Double Stranded Dna ◽  
Defective Phage

An inducible bacteriocin produced by a strain of Rhizobium trifolii was partially purified by ammonium sulfate precipitation and differential centrifugation. Examination of fractions of this material banded in sucrose gradients showed a close correlation between bacteriocin activity and presence of phage-like particles observed by electron microscopy. The particles have a head diameter of about 50 nm and have short tails. Buoyant density of intact particles in cesium chloride was 1.46 g/cm3, as compared with 1.49 g/cm3 for a reference rhizobiophage. The apparent nucleoprotein nature of the bacteriocin was confirmed by the ultraviolet absorption spectrum of CsCl-banded material. Double-stranded DNA of density 1.720 g/cm3 (compared with 1.716 g/cm3 for DNA of the phage) was identified in bacteriocin fractions obtained from CsCl density equilibrium gradients. This density was identical with that of DNA from both induced and noninduced bacterial cells of the producing strain. These characteristics and the inability to reproduce in sensitive bacteria identify the bactericidal agent as a large bacteriocin of the defective phage type. Some apparent differences between this bacteriocin and other, partly characterized bacteriocins of R. trifolii are discussed.

scholarly journals DEFECTIVE PHAGE AND CHROMOSOME MOBILIZATION IN Pseudomonas putida

1969 ◽  
Vol 64 (4) ◽  
pp. 1217-1223 ◽  
Author(s):  
A. M. Chakrabarty ◽  
I. C. Gunsalus
Keyword(s):  
Pseudomonas Putida ◽  
Defective Phage

DNA methylation and the defective phage carried lysogenically by E. coli 15

Virology ◽  
1972 ◽  
Vol 47 (2) ◽  
pp. 532-535
Author(s):  
Leo J. Grady ◽  
Wayne P. Campbell
Keyword(s):  
Dna Methylation ◽  
E Coli ◽  
Defective Phage
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