Secondary attachment site for bacteriophage lambda in the guaB gene of Escherichia coli.

lambda gua transducing bacteriophages were used to identify and sequence the secondary attachment site for lambda in the guaB gene of Escherichia coli. The sequence matched the primary core sequence at nine positions, and a putative integrase binding-site overlapped the left core-arm junction. Recombinational crossover occurred between nucleotides -3 and +2 of the core region.