Amino Acid Sequence, Artificial Gene Fusion, Aspartate Carbamoyltransferase, Base Sequence, Escherichia coli, Escherichia coli Proteins, Genes, Reporter, Models, Molecular, Molecular Sequence Data, Mutagenesis, Site-Directed, Nucleic Acid Conformation, Promoter Regions, Genetic, Terminator Regions, Genetic, Transcription, Genetic, beta-Galactosidase