[Molecular weight and restriction mapping of the DNA of cholera phages].

Molecular masses of cholera bacteriophages 493, 7226 and Eltor II were defined by electron microscopic technique. DNA of these bacteriophages was digested by the restriction endonucleases PstI, BglI, MluI and SalI. The number and molecular masses of the obtained restricts were identified. The physical map of bacteriophage 493 was constructed using three restriction endonucleases. The obtained data can be used for classification and molecular biology research of cholera bacteriophages.