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- 详细信息
- 文献和实验
- 技术资料
- 库存:
大量
- 英文名:
BL21(DE3) Chemically Competent Cells
- 保质期:
六个月
- 供应商:
上海信裕生物科技有限公司
- 保存条件:
-80℃保存六个月,避免反复冻融;干冰运输
- 规格:
100 μl×5/100 μl×10
E. coli BL21(DE3)是T7或T7/lac表达系统常用的表达菌株,其基因型为F- lon ompT hsdSB (rB-,mB-) dcm gal rne131(DE3)。T7 RNA聚合酶基因的表达受控于l噬菌体DE3区的lacUV5启动子,该区整合于BL21的染色体上。该菌适合于非毒性蛋白的重组表达。使用pUC19质粒检测,转化效率可达106cfu/μg DNA。
保存条件
-80℃保存六个月,避免反复冻融;干冰运输
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文献和实验TOP10 chemically competent cells
Overview This protocol is a variant of the Hanahan protocol [1] using CCMB80 buffer for DH10B, TOP10 and MachI strains. It builds on Example 2 of the Bloom05 patent as well. This protocol has been tested on TOP10, MachI and BL21(DE3) cells
Transforming chemically competent cells
Method Thaw TSS cells on ice. Add DNA, pipette gently to mix (1μl of prepped plasmid is more than enough). Note: If you are adding small volumes (~1μl), be careful to mix the culture well. Diluting the plasmid
Preparing chemically competent cells
Materials Plate of cells to be made competent TSS buffer LB media Ice Glassware & Equipment Falcon tubes 500μl Eppendorf tubes, on ice 200ml conical flask 200μl pipetman or repeating
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