[Recombination in bacteriophage T4: the nature of the disturbances introduced into genetic recombination by a region of non-homology].

Effects of a non-homology region associated with a deletion marker on recombination were studied in two-factor crosses between rII mutants of T4 phage. The basic experimental approach consisted of the comparison of a deletion with the point mutation located at one of the borders of the segment deleted in crosses against the same set of the test markers. The results obtained are in good accordance with the predictions of the model of elastic interaction of migrating cross connection with the nonhomology region. This accordance argues strongly in favour of the hybrid region propagation via branch migration in T4 recombination intermediates.