The role of DNA topoisomerases in recombination and genome stability: a double-edged sword?//Cell.-1990.-62, N 3.-P. 403-406. 4. Ocheroff N. Biochemical basis for the interactions of type I and type II topoisomerases with DNA // Pharm. Ther-1989.-41, N 2-P. 223-241. 5. Fukata H., Fukasava H. Isolation and partial characterization of two distinct DNA topoisomerases from Cauliflower inflorescence//J.