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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
Phi29 DNA聚合酶从一种携带有Phi29 DNA 聚合酶基因的重组大肠杆菌 (E. coli) 中提纯制备。是一种高持续扩增能力的聚合酶 (最长达70kb),具有很强的链置换活性,适合高效的等温DNA扩增。Phi29 DNA聚合酶同时还具有单链DNA偏好的3'→5'外切酶校读功能以及连续合成特性。
组分与储存:
| 组分货号 | 组分名称 | 物理外观 | 250U | 1KU | 5KU | 储存 |
| P665534A | Phi29 DNA 聚合酶 (10U/μL) | 液体 | 25μL | 100μL | 500μL | -20℃. |
| P665534B | Phi29 反应缓冲液 (10×) | 液体 | 250μL | 1mL | 5mL | -20℃. |
适用范围:
1. 全基因组合成;
2. 多重置换扩增 (MDA);
3. 滚环扩增 (RCA)。
单位定义:
1个活性单位 (U) 定义为在 30℃ 条件下,10 分钟内催化 0.5pmol的脱氧核糖核苷酸 (dNTPs) 掺入酸不溶物所需的酶量。
注意事项:
1. Phi29 反应缓冲液 (10×) 含 DTT 组分,贮存温度高于-20℃、长期贮存或反复冻融后,DTT 会快速氧化,会降低 Phi29 DNA聚合酶的扩增效率。为保证最大活性,使用长期贮存的缓冲液或反复冻融的 Phi29 反应缓冲液 (10×) 时,建议补加至体系终浓度为 4mM 的 DTT。
2. 由于该酶 3'→5'核酸外切酶校读活性较强,推荐体系中引物 3' 末端修饰以防止降解。
3. 使用该酶时宜存放在冰盒内或冰浴上,使用完毕后宜立即放置于-20℃保存。
4. 为了您的安全和健康,请穿实验服并戴一次性手套操作。
使用方法:
反应体系配制前准备:
a. 4℃溶解反应所需的各种试剂,并放置于冰浴上或冰盒内使用。建议反应液体分装使用,避免反复冻融。
b. 可参考下表中设置反应体系,建议在冰浴或在冰盒上进行体系配制:
**模板需先在 95℃孵育 3分钟,进行预变性处理。 |
反应程序:
| 步骤名称 | 温度 | 时间 |
| 反应 | 30-42℃ | 1-3h |
| 灭活 | 65℃ | 10min |
| 保存 | 4℃ | ∞ |
Phi29 DNA Polymerase is purified from recombinant E.coli carrying the Phi29 DNA polymerase gene. It is a highly processive polymerase (amplicons up to 70 kb), with strong strand-displacement activity, making it suitable for efficient isothermal DNA amplification. Phi29 DNA Polymerase also possesses 3'→5' exonuclease proofreading activity with preference for single-stranded DNA and the property of continuous synthesis.
Contents & Storage:
| Component No. | Component Name | Appearance | 250U | 1KU | 5KU | Storage |
| P665534A | Phi29 DNA Polymerase (10U/μL) | Liquid | 25μL | 100μL | 500μL | -20℃. |
| P665534B | Phi29 Reaction Buffer (10×) | Liquid | 250μL | 1mL | 5mL | -20℃. |
Scope of Application:
1. Whole-genome synthesis;
2. Multiple Displacement Amplification (MDA);
3. Rolling Circle Amplification (RCA).
Unit Definition:
One unit (U) is defined as the amount of enzyme that catalyzes the incorporation of 0.5 pmol deoxyribonucleoside triphosphates (dNTPs) into acid-insoluble material in 10 minutes at 30 °C.
Precautions:
1. Phi29 Reaction Buffer (10×) contains DTT. When stored above −20 °C, stored for a long time, or subjected to repeated freeze-thaw cycles, DTT is rapidly oxidized, which reduces the amplification efficiency of Phi29 DNA Polymerase. To maintain maximum activity, it is recommended to supplement DTT to a final concentration of 4 mM when using long-stored or repeatedly freeze-thawed Phi29 Reaction Buffer (10×).
2. This enzyme has strong 3'→5' exonuclease proofreading activity. It is recommended to modify the 3' end of primers in the reaction system to prevent primer degradation.
3. Keep the enzyme on ice or in an ice box during use. Return it to −20 °C immediately after use.
4. For your safety and health, wear a lab coat and disposable gloves during operation.
Instructions for Use:
Preparations before reaction setup:
a. Thaw all required reagents at 4 °C and keep them on ice during use. Aliquot the reaction reagents to avoid repeated freeze-thaw cycles.
b. Prepare the reaction system referring to the table below. It is recommended to assemble the reaction on ice.
** The template should be pre-denatured by incubation at 95 °C for 3 min. |
Reaction Program:
| Step Name | Temperature | Time |
| Reaction | 30-42℃ | 1-3h |
| Inactivation | 65℃ | 10min |
| Storage | 4℃ | ∞ |
| 组分货号 | 组分名称 | 物理外观 | 250U | 1KU | 5KU | 储存 |
| P665534A | Phi29 DNA 聚合酶 (10U/μL) | 液体 | 25μL | 100μL | 500μL | -20℃. |
| P665534B | Phi29 反应缓冲液 (10×) | 液体 | 250μL | 1mL | 5mL | -20℃. |
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