[A method for detecting new strains producing DNA modification and restriction enzymes--isoschizomers and isomethylomers of known restrictases and methylases].

The paper describes a technique for the detection of new strains producing enzymes which mediate DNA modification and restriction, and isoschizomers and isomethylomers of the known restriction endonucleases and methylases. Three Bacillus subtilis strains whose DNA carries a BamH1 modification have been found. Two of these strains exert the restrictase activity with an R BamH1 specificity.

Structure of the surface of spores and morphological-physiological properties of individual strains of Bacillus megaterium.

The structure of the surface of spores of 10 strains of Bacillus megaterium was investigated by the method of carbon replicas. They were separated into three groups according to the peculiarities of the structural organization of the surface of the spores. The combination of other morphological and physiological-biochemical characteristics of these strains was characteristic of the species Bac.