Specialized transducing bacteriophage lambda carrying the structural gene for a major outer membrane matrix protein of Escherichia coli K-12.

A specialized transducing phage lambda carrying the structural gene for the OmpF protein, an outer membrane matrix protein, was isolated. The phage carries the 20.5--21-min region of the Escherichia coli K-12 chromosome and carries asnS, ompF, and aspC genes.