E. coli K12 CAG597Product information
|200 ul||-||Unavailable in your region|
DescriptionA suspension of E. coli strain K12 CAG597 which has been grown in rich LB medium and brought to 50% glycerol. E. coli K12 CAG597 has rpoHam allele (sometimes referred to as htpRam) which encodes an amber mutant form of the sigma factor for the heat shock response. Grow by streaking out on an LB plate and incubating at 30°C.
GenotypeF- lacZ(am) pho(am) tyrT[supC(ts)] trp(am) rpsL(StrR) rpoH(am)165 zhg::Tn10 mal(am)
Properties and Usage
This product is covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB).
While NEB develops and validates its products for various applications, the use of this product may require the buyer to obtain additional third party intellectual property rights for certain applications.
For more information about commercial rights, please contact NEB's Global Business Development team at firstname.lastname@example.org.
This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
- The strain has a temperature-sensitive amber supressor TyrT [supC(ts)] , so upon incubation at 37°C or 42°C the strain does not suppress the heat shock sigma factor RpoH. Thus it becomes deficient in expression of the heat shock proteins. Since a number of heat shock proteins affect proteolysis, this can increase the stability of foreign proteins expressed in E. coli. CAG597 is EcoK r+m+, so plasmids have to be modified (i.e., come from an m+ strain such as TB1, JM83, JM107, etc.) in order to get transformants; the transformation frequency is 10-100X down from other common strains used for recombinant DNA work.
- Baker, T.A., Grossman, A.D. and Gross, C.A. (1984). Proc. Natl. Acad. Sci. USA. 81, 6779-6783.
The supporting documents available for this product can be downloaded below.