Can I transform unmethylated DNA into dam–/dcm– competent E.coli (C2925)?
Does New England Biolabs offer a methyltransferase free strain of Competent E.coli?
How long should I incubate cells on ice after DNA has been added (NEB #C2925H and NEB #C2925I)?
Is dam–/dcm– (NEB #C2925H/C2925I) resistant to kanamycin?
Is the DNA yield lower using dam–/dcm– strain (C2925)?
What are the solutions/recipes (C2925)?
What are the strain properties (C2925)?
What is the difference between NEB #C2925H and NEB #C2925I?
What is the optimal heat shock time for this strain (NEB #C2925H and NEB #C2925I)?
Which strain of Competent E.coli should I use for general cloning?
Why were the colonies at different size after transformation of dam–/dcm– competent E.coli (C2925)?
How should I calculate the transformation efficiency (C2925)?
Can I store competent cells at -20°C instead of -80°C?
Which kind of transformation tubes should be used?
What volume of DNA can be added into competent cells?
What is the shelf life for this strain (NEB #C2925H and NEB #C2925I)?
Are NEB’s competent cells compatible with the “Mix & Go” protocol?
How should I store SOC Outgrowth Medium? The SOC I received with my competent cells recommends storage at either room temperature or 4°C, however, when I purchase it as a stand alone product, it recommends storing it at 4°C. Which is better?
How should fragments be prepared for assembly using NEBuilder HiFi?
上海金畔生物科技有限公司代理New England Biolabs(NEB)酶试剂全线产品,欢迎访问官网了解更多产品信息和订购。
产品信息
双链 DNA 分离自 lambda 噬菌体(cI857ind 1 Sam 7)。该噬菌体以不含腺嘌呤甲基化酶 (dam–) 的大肠杆菌为宿主。因此,其脱氧腺苷位点不会被甲基化。而在野生型大肠杆菌宿主中,该位点则被甲基化。该 DNA 可以被那些对 dam 甲基化敏感的限制性内切酶完全酶切。Lambda DNA (dam-) 的长度为 48,502 bp。
来源
该噬菌体分离自热诱导溶源性大肠杆菌 (dam–)。使用苯酚抽提纯化的噬菌体 DNA,并用 10 mM Tris-HCl(pH 8.0)、1 mM EDTA 透析。
产品类别:
DNA Plasmids & Substrates Products
产品组分信息
本产品提供以下试剂或组分:
NEB #
名称
组分货号
储存温度
数量
浓度
N3013S
-20
Lambda DNA (dam-)
N3013SVIAL
-20
1 x 0.5 ml
500 µg/ml
N3013L
-20
Lambda DNA (dam-)
N3013LVIAL
-20
2 x 1.25 ml
500 µg/ml
特性和用法
贮存溶液
10 mM Tris-HCl 1 mM EDTA pH 8 @ 25°C
相关产品
相关产品
Lambda DNA
t1010-monarch-plasmid-miniprep-kit
Monarch® DNA 胶回收试剂盒
Monarch® PCR & DNA 纯化试剂盒(5 μg)
注意事项
该 DNA 的优点在于它可以被部分限制性内切酶(如 BclI、MboI、DpnII 等)完全酶切,在大多数大肠杆菌菌株中,这些酶的识别位点仅被部分修饰。
参考文献
Daniels, D.L. et al. (1983). Appendix II: Complete Annotated Lambda Sequence. R.W. Hendrix, J.W. Roberts, F.W. Stahl and R.A. Weisberg(Ed.), Lambda-II. 519-676. New York: Cold Spring Harbor Laboratory Press.
FAQs & 问题解决指南
FAQs
What is the DNA sequence of this product?
Are the Lambda DNA (NEB #N3011) and Lambda DNA (dam-) (NEB #N3013) methylated?
上海金畔生物科技有限公司代理New England Biolabs(NEB)酶试剂全线产品,欢迎访问官网了解更多产品信息和订购。
Lambda DNA (dam-)
Lambda DNA is a commonly used DNA substrate
Isolated from a dam- E.coli strain, this DNA can be digested with restriction endonucleases that are sensitive to dam methylation
View sequence details
产品信息
Duplex DNA is isolated from bacteriophage lambda (cI857ind 1 Sam 7). The bacteriophage is grown in an E. coli host which is deficient in adenine methylase (dam–). Therefore, those deoxyadenosine positions which are methylated in a wild type E. coli host are not methylated in the dam– host. This DNA gives complete digests with restriction endonucleases that are sensitive to dam methylation. Lambda DNA (dam-) is 48,502 base pairs in length.
来源
The phage is isolated from a heat-inducible E. coli(dam–) lambda lysogen. The DNA is isolated from purified phage by phenol extraction and dialyzed against 10 mM Tris-HCl (pH 8.0)and 1 mM EDTA.
产品类别:
DNA Plasmids & Substrates Products
产品组分信息
产品组分信息
本产品提供以下试剂或组分:
NEB #
名称
组分货号
储存温度
数量
浓度
N3013S
-20
Lambda DNA (dam-)
N3013SVIAL
-20
1 x 0.5 ml
500 µg/ml
N3013L
-20
Lambda DNA (dam-)
N3013LVIAL
-20
2 x 1.25 ml
500 µg/ml
特性和用法
贮存溶液
10 mM Tris-HCl 1 mM EDTA pH 8 @ 25°C
相关产品
相关产品
Lambda DNA
Monarch® Plasmid Miniprep Kit
Monarch® DNA Gel Extraction Kit
Monarch® PCR & DNA Cleanup Kit (5 μg)
注意事项
The advantage of this DNA is that it gives complete digests with those restriction endonucleases (BclI, MboI, DpnII, etc.) whose recognition sites are partially modified by most E. coli strains.
参考文献
Daniels, D.L. et al. (1983). Appendix II: Complete Annotated Lambda Sequence. R.W. Hendrix, J.W. Roberts, F.W. Stahl and R.A. Weisberg(Ed.), Lambda-II. 519-676. New York: Cold Spring Harbor Laboratory Press.