Mutation increases lambda lysogeny by inactivating specific protease. D lon Deletion of the lon protease. Reduces degradation of b-galactosidase fusion proteins to enhance antibody screening of l libraries. Inability to utilize maltose. Gene central to general recombination and DNA repair.
Mutation eliminates general recombination and renders bacteria sensitive to UV light.
BCD Exonuclease V. Mutation in recB or recC reduces general recombination to a hundredth of its normal level and affects DNA repair. Mutation makes cells resistant to streptomycin. Also written strA . Some phage require a mutation in this gene in order to grow. Some phage require a mutation in this gene in order to grow.