[Variability of Bacillus thuringiensis bacteriophages with C2-morphology]. / Variabel'nost' fagov Bacillus thuringiensis C2-morfologii.

ABSTRACT

Biological as well as physicochemical properties of Bacillus thuringiensis bacteriophages "17" and "7/13" having C2-morphology and isolated from factory phagolysates were studied. The bacteriophages are identical in the lytic spectrum++, morphology, size, GC-content, have the same buoyant density. The physical map for restriction endonucleases EcoRI, HindIII, SalGI and MvaI has been constructed of the bacteriophages DNA. Heteroduplex analysis has revealed the nonhomologous region of the deletion-insertion type as a 0.8 Md loop. The bacteriophages "17" and "7/13" are concluded to be closely related but not identical.