WarmStart® RTx Reverse Transcriptase |NEB酶试剂 New England Biolabs

发表于由

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

WarmStart® RTx Reverse Transcriptase |

WarmStart RTx Reverse Transcriptase is a unique in silico designed RNA-directed DNA polymerase coupled with a reversibly-bound aptamer that inhibits RTx activity below 40°C. This enzyme can synthesize a complementary DNA strand initiating from a primer using RNA (cDNA synthesis) or single-stranded DNA as a template. RTx is a robust enzyme for RNA detection in amplification reactions and is particularly well suited for use in LAMP (loop-mediated isothermal amplification). The WarmStart property enables high throughput applications, room temperature setup, and increases the consistency and specificity of amplification reactions. RTx contains intact RNase H activity.

To support lyophilization, incorporation into microfluidic devices, and enable quick adoption into automation workflows, WarmStart RTx Reverse Transcriptase is also offered in a glycerol-free format.

Improved Speed and Sensitivity in RT-LAMPWarmStart® RTx Reverse Transcriptase |
RT-LAMP reactions with Bst 2.0 WarmStart DNA Polymerase and the indicated reverse transcriptase were incubated at 65°C with 1 pg – 100 ng of Jurkat total RNA. Reactions were monitored with real-time fluorescence, and the resulting curves are shown on left, with the corresponding threshold times on right. WarmStart RTx provides faster reaction threshold times for improved consistancy and sensitivity with lower input RNA amounts. RT-LAMP reactions performed with AMV Reverse Transcriptase resulted in inconsistent detection, as indicated by wide variation at lower RNA input concentrations (blue curves).
Sensitive Detection with Reduced False Negatives

Total RNA WarmStart RTx AMV RT
100 ng 3/3 3/3
10 ng 3/3 3/3
1 ng 3/3 3/3
100 pg 3/3 2/3
10 pg 3/3 2/3
1pg 3/3 1/3
RT-LAMP reactions were performed with WarmStart RTx and AMV Reverse Transcriptase with total RNA at 6 input concentrations. Positive detection, indicated by fluorescent detection with a twenty-minute reaction time, was achieved down to 1 pg of total input RNA. Use of AMV resulted in false negatives when total RNA was 100 pg or lower.
WarmStart Control of WarmStart RTxWarmStart® RTx Reverse Transcriptase |
cDNA synthesis was performed for 10 minutes followed by qPCR analysis. Resulting Cts were normalized against both a “no RT” control for 0% activity and the fastest Ct for 100% activity. WarmStart RTx is inhibited by a reversibly-bound aptamer at temperatures below 40°C.
Robust RT-LAMP Across a Range of TargetsWarmStart® RTx Reverse Transcriptase |
A variety of RT-LAMP targets were amplified using Bst 2.0 WarmStart DNA Polymerase and the indicated reverse transcriptase. Reactions with WarmStart RTx resulted in faster threshold times and more consistent reaction success across a range of targets and copy number. 
产品类别:
RT-PCR Products,
cDNA Synthesis & Reverse Transcriptases Products

应用:
Strand Displacement Amplification & Nicking Enzyme,
cDNA Synthesis,
Reverse Transcription (cDNA Synthesis),

Loop-Mediated Isothermal Amplification,
RT-PCR & cDNA Synthesis,
Isothermal Amplification,

PCR

  • 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
    • M0380S     -20    
        WarmStart® RTx Reverse Transcriptase M0380SVIAL -20 1 x 0.027 ml 15,000 units/ml
        Isothermal Amplification Buffer Pack B0537SVIAL -20 1 x 1.5 ml 10 X
        Magnesium Sulfate (MgSO4) Solution B1003SVIAL -20 1 x 1.5 ml 100 mM
    • M0380L     -20    
        WarmStart® RTx Reverse Transcriptase M0380LVIAL -20 1 x 0.134 ml 15,000 units/ml
        Isothermal Amplification Buffer Pack B0537SVIAL -20 1 x 1.5 ml 10 X
        Magnesium Sulfate (MgSO4) Solution B1003SVIAL -20 1 x 1.5 ml 100 mM

  • 特性和用法

    单位定义

    One unit is defined as the amount of enzyme that will incorporate 1 nmol of dTTP into acid-insoluble material in a total reaction volume of 50 μl in 20 minutes at 50°C using poly(rA)•oligo(dT)18 as template.

    反应条件

    1X Isothermal Amplification Buffer Pack

    1X Isothermal Amplification Buffer Pack
    20 mM Tris-HCl
    10 mM (NH4)2SO4
    50 mM KCl
    2 mM MgSO4
    0.1% Tween® 20
    (pH 8.8 @ 25°C)

    贮存溶液

    100 mM KCl
    10 mM Tris-HCl
    0.1 mM EDTA
    1 mM DTT
    50% Glycerol
    pH 7.4 @ 25°C

    热失活

    80°C for 10 minutes

    单位活性检测条件

    20 mM Tris-HCl (pH 8.8), 10 mM (NH4)2SO4, 50 mM KCl, 2 mM MgSO4, 0.1% Tween-20, 0.5 mM dTTP, 0.4 mM poly(rA)•oligo(dT)18.

  • 优势和特性

    应用特性

    • RT-LAMP
    • cDNA synthesis
    • RT reactions requiring room temperature setup

  • 相关产品

    相关产品

    • 随机引物混合液
    • 小鼠 RNase 抑制剂
    • dNTP 套装
    • dNTP 混合液
    • m0537-bst-20-dna-polymerase
    • m0538-bst-20-warmstart-dna-polymerase
    • 等温扩增缓冲液套装

  • 注意事项

    1. 反应条件：25 µl 反应体系：1X 等温扩增反应缓冲液、模板、引物、dNTP 和 0.25 – 0.5 µl WarmStart RTx 反转录酶。50℃ – 55℃ 温育进行 cDNA 合成；或直接 65℃ 反应进行一步法 RT-LAMP。

操作说明、说明书 & 用法

  • 操作说明

    1. Typical RT-LAMP Protocol
    2. Typical cDNA Synthesis Protocol with WarmStart RTx (NEB #M0380)

工具 & 资源

  • Web 工具

    • NEB LAMP Primer Design Tool

FAQs & 问题解决指南

  • FAQs

    1. The product size was previously listed in Reactions and is now listed in Units. What has changed?
    2. What is LAMP and RT-LAMP?
    3. What advantages does WarmStart® RTx provide?
    4. How sensitive is RNA amplification with WarmStart® RTx?
    5. Can WarmStart® RTx be inactivated?
    6. Is WarmStart® RTx active in other buffers?
    7. How do I use WarmStart® RTx in RT-LAMP?
    8. What is the maximum length of cDNA product produced by WarmStart® RTx?
    9. How do I use WarmStart® RTx for cDNA synthesis?
    10. Does WarmStart® RTx have RNase H activity?
    11. What dNTPs do you recommend for use with WarmStart® RTx?
    12. Can DNA be used as a template for WarmStart® RTx?
    13. Does NEB have a master mix for LAMP or RT-LAMP reactions?