Identification of a second cryptic lambdoid prophage locus in the E. coli K12 chromosome

Abstract
In addition to the cryptic lambdoid prophage genes that are known to reside at the rac locus in Escherichia coli K12 strains, a second cryptic lambdoid prophage has been located near the gal operon. This prophage was shown to contain DNA that is homologous to the QSR genes of λ phage.