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XL10-Gold Cells Supplied in New Single-Reaction Format

hat a heat pulse of 54C for 60 seconds was optimal to achieve an efficiency of 1 x 109 transformants/g of supercoiled DNA in the single-tube format.

The XL10-Gold strain exhibits a faster growth rate and produces larger colonies than other commonly used hosts like DH5a and XL2-Blue. To quantitate this difference, we performed a standard growth curve for these strains harboring the pBluescript plasmid. Results in Figure 1 show that XL10-Gold cells grew demonstrably faster than DH5a and XL2-Blue cells.

Figure 1

Conclusions

Stratagene now provides SoloPack Gold supercompetent cells (1 x 109 transformants/g supercoiled DNA) and competent cells (1 x 108 transformants/g supercoiled DNA) created from our XL10-Gold strain in a handy single-reaction format. The XL10-Gold strain exhibits the Hte phenotype for high transformation efficiency and provides robust growth to produce larger colonies than other commonly used hosts. Combine the XL10-Gold strain with the SoloPack format, and streamline the transformation process while retaining high efficiency.

Genotype

XL10-Gold strain: Tetr D(mcrA)183 D(mcrCB-hsdSMR-mrr)173 endA1 supE44 thi-1 recA1 gyrA96 relA1 lac Hte [F proAB lacI qZDM15 Tn10 (Tetr) Amy Camr]

The XL10-Gold strain is tetracycline and chloramphenicol resistant.

REFERENCES
  1. Jerpseth, B., Callahan, M., and Greener, A. (1997) Strategies 10: 37-38.

  2. Jerpseth, M., et al. (1998) Strategies 11: 3-4.


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