Abstract
Upon injection parental DNA enters a proteinaceous complex in which the replicative moiety of DNA is preferentially located. This complex can be disrupted by sonication or treatment with proteolytic enzymes. With parental phage of good viability, all the injected DNA undergoes semiconservative replication. The complex formation occurs in the presence of CM. The DNA of UV-inactivated phage is also complexed upon injection. Complex formation as a prerequisite for replication and possibly recombination is emphaslzed.