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
产品来源
大肠杆菌菌株,携带有 topA 基因
- 产品类别:
- DNA Repair Enzymes and Structure-specific Endonucleases Products
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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 -
M0301S -20 Topoisomerase I (E. coli) M0301SVIAL -20 1 x 0.02 ml 5,000 units/ml rCutSmart™ Buffer B6004SVIAL -20 1 x 1.25 ml 10 X
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M0301L -20 Topoisomerase I (E. coli) M0301LVIAL -20 1 x 0.1 ml 5,000 units/ml rCutSmart™ Buffer B6004SVIAL -20 1 x 1.25 ml 10 X
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特性和用法
单位定义
1 单位指在 25 μl 总反应体系中,37℃ 条件下,15 分钟内能催化超过 95% 的 0.5 μg pUC19 RF I 型(负超螺旋)DNA 松弛所需的酶量。DNA 超螺旋化通过不含溴化乙锭的琼脂糖凝胶电泳来检测。
反应条件
1X rCutSmart™ 缓冲液
Incubate at 37°C1X rCutSmart™ 缓冲液
50 mM Potassium Acetate
20 mM Tris-acetate
10 mM Magnesium Acetate
100 µg/ml Recombinant Albumin
(pH 7.9 @ 25°C)在不同缓冲液中的活性
NEBuffer™ 1: 25%
NEBuffer™ 2: 50%
NEBuffer™ 3: 0%
NEBuffer™ 4: 100%贮存溶液
10 mM Tris-HCl
35 mM (NH4)2SO4
50 mM KCl
1 mM DTT
0.1 mM EDTA
50% Glycerol
pH 7.5 @ 25°C热失活
65°C for 20 minutes
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相关产品
相关产品
- t1010-monarch-plasmid-miniprep-kit
- Monarch® DNA 胶回收试剂盒
- Monarch® PCR & DNA 纯化试剂盒(5 μg)
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参考文献
- Liu, L.F., Depew, R.E. and Wang, J.C. (1976). J. Mol. Biol.. 106, 439-452.
- Kirkegaard, K. and Wang, J.C. (1978). Nucl. Acids Res.. 5, 3811-3820.
操作说明、说明书 & 用法
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操作说明
- Protocol for Topoisomerase I (E. coli) (M0301)
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使用指南
- DNA Damage and PreCR
FAQs & 问题解决指南
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FAQs
- Does Topoisomerase I relax all supercoiled DNA to the same degree or are the products an equilibrium of various conformations?
- If the DNA resulting from a Topoisomerase I reaction is run in an ethidium bromide gel and there seems to be no evidence of enzyme activity, what is the most probable explanation?
- What is the molecular weight of Topoisomerase I?
- Can Topoisomerase I relax both positively and negatively supercoiled DNA?
- Does E. coli Toposiomerase I have the same properties as the Vaccinia Topoisomerase I?
- Will Topoisomerase I produce single strand-breaks in a plasmid?
- Can you tell me more about the switch from BSA to Recombinant Albumin (rAlbumin) in NEBuffers?