Mosharrafa E, Pilacinski W, Zissler J, Fiandt M, Szybalski W
Mol Gen Genet. 1976 Aug 10;147(1):103-9. doi: 10.1007/BF00337943.
In this study we characterize a variant of the lambdacI857S7 prophage, designated lambdabi2cI857S7, which carries a DNA insertion. The insertion sequence is IS2, and it resides in the antipolar orientation II just upstream from the gene for prophage excision (xis) at 61.6%lambda. This bi2 insertion mutant could prove valuable for studies on possible recombination functions of IS2 DNA and of its effect on the lambda integration and excision functions.