[Cleavage of DNA from 2 phages of Bacillus thuringiensis by EcoRI and HindIII endonucleases].

The DNA of two Bacillus thuringiensis phages was restricted by endonucleases EcoRI and HindIII and the electrophoretic distribution of the fragments in agarose gel was studied. EcoRI was shown to restrict the DNA of phage 1-97A into 8 fragments and the DNA of phage 1-97B into 12 fragments. Restriction with HindIII results in the formation of 22 and 9 fragments for phage 1-97A and phage 1-97B, respectively. The molecular mass of the DNAs determined by summing up EcoRI restricts is 80.87 MDa for phage 1-97A and 32.45 MDa for phage 1-97B.