[Genetic study of bacteriophage phi81. II. Gene localization in the right arm of the phage chromosome and a comparison of phage phi81 with phages lambda and phi80 in regard to gene functions].

Data on genetic investigation on lambdoid bacteriophage phi81 made possible to localize the cos site on the prophage genetic map. Four essential genes and the gene c1 are located in the right arm of the phage genetic map. Regulatory genes of phage phi81 are found to be uncapable of functional substitution of lambda phages regulatory genes N and Q. It is discovered that some late genes of phage phi80 can be substituted with respective phage phi81 genes. No substitution possibility was observed for a number of early genes of phage phi80.