Bacterial Outer Membrane Proteins, Base Sequence, Cytosine Deaminase, DNA Primers, Escherichia coli, Escherichia coli Proteins, Gene Expression Regulation, Bacterial, Membrane Transport Proteins, Molecular Sequence Data, Mutation, Nucleoside Deaminases, Operon, Plasmids, Promoter Regions, Genetic, Recombinant Fusion Proteins, Transcription, Genetic, Uridine Triphosphate, beta-Galactosidase