Analysis of genetic regulatory mechanisms.

Bacterial Proteins/metabolism Cell Fusion Chromosome Mapping Chromosomes, Bacterial DNA Nucleotidyltransferases/metabolism DNA, Bacterial/analysis DNA-Directed RNA Polymerases/metabolism Deoxyribonucleotides/analysis Diploidy Enzyme Induction Enzyme Repression Escherichia coli/enzymology,metabolism,physiology Genes, Regulator Genetics, Microbial Hybrid Cells Lactose/metabolism Mutation Operon Peptide Chain Termination, Translational Phenotype RNA, Bacterial/analysis

Bacterial Proteins DNA, Bacterial Deoxyribonucleotides RNA, Bacterial DNA Nucleotidyltransferases DNA-Directed RNA Polymerases Lactose