Comparative Study
doi: 10.1093/nar/13.16.5919.
A convenient technique to compare the efficiency of promoters in Escherichia coli
- PMID: 3162159
- PMCID: PMC321922
- DOI: 10.1093/nar/13.16.5919
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Comparative Study
A convenient technique to compare the efficiency of promoters in Escherichia coli
Nucleic Acids Res.
.
Free PMC article
Abstract
We describe a technique which allows one to insert any promoter in front of the chromosomal malPQ operon. This can be done easily by using only one plasmid, one strain, and two simple selections. Properties of the final chromosomal fusion are such that the level of amylomaltase, the product of the malQ gene, measures quantitatively the efficiency of the inserted promoter. This method was utilized to compare the efficiency of four well-known promoters: lacZp, trp, tac, lambdaPR and three malT activated promoters: malPp, malkP and malEp.
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