title: Organization of genes in the four minute region of the Escherichia coli chromosome: evidence that rpsB and tsf are co-transcribed.
abstract: Restriction endonuclease-generated DNA fragments of lambda polC-9 (Friesen et al. 1976) have been cloned on plasmid vehicles. Expression of genes carried by these plasmids was determined either by genetic complementation of the appropriate mutants, or in ultraviolet-irradiated cells. On the basis of these experiments we have inferred the following gene order in the four minute region of the Escherichia coli chromosome: tonA-dapD4-dapD2-rpsB-tsf-22 kilodalton protein - fir 27,000-firA-dnaE. We suggest that rpsB and tsf are in one transcriptional unit, with rpsB being promoter-proximal. We also suggest the possible position of the promoter for dnaE.
mesh_terms: D002876:Chromosomes, Bacterial / Q000648:ultrastructure*; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics*; D005786:Gene Expression Regulation; D005796:Genes; D008040:Genetic Linkage; D009876:Operon; D010445:Peptide Elongation Factors / Q000235:genetics*; D010957:Plasmids; D012269:Ribosomal Proteins / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D010445:Peptide Elongation Factors; D012269:Ribosomal Proteins