QuantiTect Probe PCR Kits

使用序列特异性探针进行两步法实时定量RT-PCR,用于基因表达分析

  • 高灵敏度检测低拷贝的模板
  • 准确检测各种起始量的模板
  • 可用各种序列特异性探针,用于各种PCR仪
  • 提供含有或不含尿嘧啶DNA糖基化酶(UNG)两种包装
  • 无需优化反应和循环条件

QuantiTect Probe PCR Kit使用序列特异性探针通过两步法real-time PCR对cDNA目标序列进行灵敏的定量分析。即用型预混液使用热启动和独特的PCR缓冲液,无需优化即可在各种real-time PCR仪上进行高度灵敏的定量PCR。dNTP混合液含有dUTP,可选择性进行UNG处理。为便于使用,预混液可储存在2–8°C。

Product Cat. no. List price:
QuantiTect Probe PCR Kit (200)
For 200 x 50 µl reactions: 3 x 1.7 ml 2x QuantiTect Probe PCR Master Mix, 2 x 2 ml RNase-Free Water
204343
466,00 €
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QuantiTect Probe PCR Kit (1000)
For 1000 x 50 µl reactions: 25 ml 2x QuantiTect Probe PCR Master Mix, 20 ml RNase-Free Water
204345
1.924,00 €
Add to cart
QuantiTect Probe PCR +UNG Kit (200)
For 200 x 50 µl reactions: 3 x 1.7 ml 2x QuantiTect Probe PCR Master Mix, 100 ul UNG Solution, 2 x 2 ml RNase-Free Water
204363
521,00 €
Add to cart
QuantiTect Probe PCR Kits are intended for molecular biology applications. These products are not intended for the diagnosis, prevention, or treatment of a disease.
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Effective UNG digestion.|Two-step RT-PCR.|Highly specific amplification.|Wide dynamic range in two-step PCR.|Wide dynamic range in real-time PCR.|High sensitivity and efficiency, and wide dynamic range.|Specific primer annealing.|
106 copies of two dUMP-containing PCR amplicons were treated with or without UNG and then amplified by real-time PCR. UNG was from various suppliers, and real-time PCR was performed using the master mix from the QuantiTect Probe PCR +UNG Kit. ΔCT on the Y-axis indicates CT values for non-UNG-treated samples subtracted from CT values for UNG-treated samples. The UNG supplied with the QuantiTect Kit provided the greatest ΔCT (9-12 cycles). This indicates that QIAGEN UNG digests carryover PCR products more effectively than UNG from other suppliers.|The QuantiTect Probe PCR Kit overcomes the need for optimization of reaction conditions, which can be tedious and time-consuming. Simply add primers, probe, and cDNA template to the ready-to-use PCR master mix, and start the reaction on any real-time cycler (see also the table "Components of 2x QuantiTect Probe PCR Master Mix").|In comparison with other DNA polymerases, only HotStarTaq DNA Polymerase in combination with a unique buffer specifically amplified a 497 bp fragment (from 50 copies of an HIV-pol-gene construct in a background of 1 µg human genomic DNA). M: Markers.|Duplicate reactions were performed on the Mx3005P using tenfold dilutions of human keukocyte cDNA (10 ng to 0.01 ng) and a TaqMan assay for IL1R2 (a cytokine). The QuantiTect Probe PCR Kit provided accurate gene expression analysis from low to high template amounts with a PCR efficiency of 101%.|Probe-based real-time PCR with UNG pretreatment was carried out using the QuantiTect Probe PCR +UNG Kit. Reactions were run in duplicate on the ABI PRISM 7900 using 10-fold dilutions of human leukocyte cDNA (100 ng to 10 pg) and a TaqMan assay for IL8 (a cytokine). The amplification plots were evenly spaced, leading to a high PCR efficiency of 94%.|Tenfold serial dilutions of leukocyte cDNA (100 ng to 1 pg) were analyzed in duplicate on the Mx3005 using the QuantiTect Probe PCR Kit with primers and a FAM-labeled probe specific for IL8 (interleukin 8). A PCR efficiency of 97% over 6 logs of template dilution was achieved, and as little as 1 pg of IL8 transcript was sensitively detected.| A balanced combination of KCl and (NH4)2SO4 promotes specific annealing of primers and probes to the PCR template. K+ binds to phosphate groups on double-stranded DNA, stabilizing annealing of primers and probes. NH4+ destabilizes weak hydrogen bonds between mismatched bases. |
Performance

QuantiTect Probe PCR Kit配合QuantiTect Reverse Transcription Kit可得到灵敏、可靠的结果(参见"High sensitivity and efficiency, and wide dynamic range")。独特的PCR缓冲液组分使QuantiTect Probe PCR Kit能够高灵敏度的定量检测低拷贝的DNA靶序列,在宽泛的范围内符合线性规律,实现准确定量检测(参见"Wide dynamic range in two-step RT-PCR")。与其他聚合酶相比,HotStarTaq DNA Polymerase具有严谨的热启动,进一步提高了PCR反应的特异性(参见"Highly specific amplification")。

PCR污染的主要来源是PCR产物中的残余DNA污染。在PCR前使用UNG预处理,可确保污染的PCR产物不会影响后续的PCR。QuantiTect Probe PCR +UNG Kit中经特别优化的UNG溶液配合经验证的PCR预混液可有效避免PCR产物污染,并对靶序列进行可靠的定量(参见"Effective UNG digestion"和"Wide dynamic range in real-time PCR")。

Principle

QuantiTect Probe PCR Kit含有优化的即用型预混液,可使用序列特异性探针对cDNA靶序列进行高特异性和灵敏度的real-time定量分析。此试剂盒适用于各种类型的序列特异性探针,包括水解探针检测(如TaqMan和其他双标记探针)、FRET探针和Molecular Beacons。QuantiTect Probe PCR Kit独特的PCR缓冲液含有K+和NH4+,能促使特异性引物退火,获得高PCR特异性和灵敏度(参见"Specific primer annealing")。此外,HotStarTaq DNA Polymerase具有严格的热启动,可防止非特异性产物的形成。

QuantiTect Multiplex PCR Master Mix含有dUTP,可在PCR前使用尿嘧啶DNA糖基化酶 (UNG)预处理,保证污染的PCR产物不会影响后续的PCR反应。

2x QuantiTect Probe PCR Kit的组份
组份 特点 优势
HotStarTaq DNA Polymerase 95ºC孵育15分钟即可活化 室温下即可构建qPCR反应体系
QuantiTect Probe PCR Buffer NH4+和K+的平衡组合 特异性引物退火确保PCR结果可靠
dNTP mix 含有dUTP,会部分替代dTTP,可进行UNG处理 可选择进行UNG处理,以消除PCR产物中的残余污染物
ROX dye 在Applied Biosystems或Agilent的PCR仪上进行荧光信号校准 可在需要ROX染料的PCR仪上进行准确的定量检测。不会干扰其他real-time PCR仪
Procedure

QuantiTect Probe PCR Kit无需进行繁琐耗时的反应条件优化。只需简单地将引物、探针和cDNA模板加入到即用型PCR预混液中,即可开始反应(参见"Two-step RT-PCR")。使用操作手册中的实验方案可在任何real-time PCR仪上得到快速、可靠的结果。如果需要,反应液可用尿嘧啶DNA糖基化酶(UNG)预处理,以去除PCR产物中残留的污染。

为在两步法real-time RT-PCR中获得理想结果,我们推荐使用QuantiTect Reverse Transcription Kit合成cDNA。此试剂盒可在20分钟内快速合成cDNA,并可去除基因组DNA污染。

Applications

QuantiTect Probe PCR Kit可用于在各种real-time PCR仪上对cDNA目标序列进行基因表达分析,包括Applied Biosystems、Bio-Rad、Cepheid、Eppendorf、Roche和Agilent的仪器。在Rotor-Gene Q实时荧光定量PCR分析仪上使用时,我们推荐专门为快速PCR研发的Rotor-Gene Probe PCR Kit。

Feature
Specifications
Applications Real-time quantification of DNA, cDNA, or RNA targets
Reaction type PCR and two-step RT-PCR
Real-time or endpoint Real-time
Sample/target type DNA, cDNA, RNA
Single or multiplex Single
SYBR Green I or sequence-specific probes Sequence-specific probes
Thermal cycler Most real-time cyclers (e.g. LC, RG, ABI)
With or without ROX With ROX

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Kit Handbooks
2
For use with QuantiTect PCR Kits to eliminate carryover of PCR products
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For quantitative, real-time PCR and two-step RT-PCR using sequence-specific probes
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Safety Data Sheets
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Download Safety Data Sheets for QIAGEN product components.
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Images
Effective UNG digestion.
Effective UNG digestion.
106 copies of two dUMP-containing PCR amplicons were treated with or without UNG and then amplified by real-time PCR. UNG was from various suppliers, and real-time PCR was performed using the master mix from the QuantiTect Probe PCR +UNG Kit. ΔCT on the Y-axis indicates CT values for non-UNG-treated samples subtracted from CT values for UNG-treated samples. The UNG supplied with the QuantiTect Kit provided the greatest ΔCT (9-12 cycles). This indicates that QIAGEN UNG digests carryover PCR products more effectively than UNG from other suppliers.
PCR and two-step RT-PCR.
Two-step RT-PCR.

The QuantiTect Probe PCR Kit overcomes the need for optimization of reaction conditions, which can be tedious and time-consuming. Simply add primers, probe, and cDNA template to the ready-to-use PCR master mix, and start the reaction on any real-time cycler (see also the table "Components of 2x QuantiTect Probe PCR Master Mix").

Highly specific amplification.
Highly specific amplification.
In comparison with other DNA polymerases, only HotStarTaq DNA Polymerase in combination with a unique buffer specifically amplified a 497 bp fragment (from 50 copies of an HIV-pol-gene construct in a background of 1 µg human genomic DNA). M: Markers.
Wide dynamic range in two-step RT-PCR
Wide dynamic range in two-step PCR.

Duplicate reactions were performed on the Mx3005P using tenfold dilutions of human keukocyte cDNA (10 ng to 0.01 ng) and a TaqMan assay for IL1R2 (a cytokine). The QuantiTect Probe PCR Kit provided accurate gene expression analysis from low to high template amounts with a PCR efficiency of 101%.

Wide dynamic range in real-time PCR.
Wide dynamic range in real-time PCR.
Probe-based real-time PCR with UNG pretreatment was carried out using the QuantiTect Probe PCR +UNG Kit. Reactions were run in duplicate on the ABI PRISM 7900 using 10-fold dilutions of human leukocyte cDNA (100 ng to 10 pg) and a TaqMan assay for IL8 (a cytokine). The amplification plots were evenly spaced, leading to a high PCR efficiency of 94%.
High sensitivity and efficiency, and wide dynamic range.
High sensitivity and efficiency, and wide dynamic range.
Tenfold serial dilutions of leukocyte cDNA (100 ng to 1 pg) were analyzed in duplicate on the Mx3005 using the QuantiTect Probe PCR Kit with primers and a FAM-labeled probe specific for IL8 (interleukin 8). A PCR efficiency of 97% over 6 logs of template dilution was achieved, and as little as 1 pg of IL8 transcript was sensitively detected.
Specific primer annealing using a balanced combination of K+ and NH4+ ions
Specific primer annealing.

A balanced combination of KCl and (NH4)2SO4 promotes specific annealing of primers and probes to the PCR template. K+ binds to phosphate groups on double-stranded DNA, stabilizing annealing of primers and probes. NH4+ destabilizes weak hydrogen bonds between mismatched bases.