Copy number of plasmids with p15A origin of replication

Range 20-30 copies/cell
Organism Bacteria Escherichia coli
Reference Lutz R, Bujard H. Independent and tight regulation of transcriptional units in Escherichia coli via the LacR/O, the TetR/O and AraC/I1-I2 regulatory elements. Nucleic Acids Res. 1997 Mar 1525(6):1203-10PubMed ID9092630
Method The intracellular copy numbers were determined by comparing luciferase activity of cells harbouring the respective plasmids with the activity in cells containing only a single luciferase expression unit integrated in the chromosome (data not shown).
Comments Module II contains an origin of replication which is protected from outside transcriptional readthrough (ref 14 ) by two terminators. All promoter sequences which are aligned via the -10 hexamer are flanked by Xho I (upstream) and Eco RI (downstream) cleavage sites.
Entered by Ron Milo - Admin
ID 100260