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Overview
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XL1-Blue is the most popular strain for blue/white screening. It is also an excellent host strain for routine cloning application using plasmid or lambda vectors. XL1-Blue cells are endonuclease (endA) deficient, which greatly improve the quality of mini-prep DNA, and are recombination (recA) deficient, improving insert stability. The hsdR mutation prevents the cleavage of cloned DNA by the EcoK endonuclease system. The lacIqZΔM15 gene on the F´ episome allows blue-white color screening.
Features
• A strain modified to be ideal for blue/white screening
• Tetracycline resistantPlease contact us at for specific academic pricing.
More Details
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![ECOS™ 2163 Competent Cells [GM2163]](https://resource.amerigoscientific.com/p-img/AS_2025-10-14_13-20-40.png)
![ECOS™ X Competent Cells [DH5α]](https://resource.amerigoscientific.com/p-img/AS_2025-10-14_11-28-11.png)
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