Genomic DNA contamination can be a significant problem during real-time RT-PCR because co-amplification of genomic DNA and cDNA can lead to erroneous results. With the PrimeScript RT Reagent Kit with gDNA Eraser (Perfect Real Time), genomic DNA contamination is eliminated. This reverse transcription kit enables fast cDNA synthesis for real-time RT-PCR (qPCR) and includes a rapid step that eliminates genomic DNA (gDNA) contamination without loss of input RNA.
Genomic DNA contamination can be a significant problem during real-time RT-PCR because co-amplification of genomic DNA and cDNA can lead to erroneous results. With the PrimeScript RT Reagent Kit with gDNA Eraser (Perfect Real Time), genomic DNA contamination is eliminated. This reverse transcription kit enables fast cDNA synthesis for real-time RT-PCR (qPCR) and includes a rapid step that eliminates genomic DNA (gDNA) contamination without loss of input RNA.
The PrimeScript RT Reagent Kit with gDNA Eraser (Perfect Real Time) includes PrimeScript reverse transcriptase, a modified RNase H-minus recombinant MMLV (Moloney Murine Leukemia Virus) enzyme which allows fast cDNA synthesis due to its exceptionally strong strand-displacement activity. PrimeScript RTase is robust, versatile, and can be used to prepare cDNA from almost any RNA template, including GC-rich templates and RNAs with significant secondary structure. Because of the excellent extension capacity of PrimeScript, cDNA synthesis reactions can be performed at lower temperatures (i.e., 42°C), decreasing the risk of RNA degradation.
In the first step, genomic DNA contamination is eliminated by treating the samples with gDNA Eraser (an optimized, potent DNA-degradation enzyme) for 2 minutes at 42°C. The subsequent reverse transcription reaction includes a component that completely inhibits DNA degradation activity, and reverse transcription is complete in just 15 minutes. The final result is high-quality cDNA with no trace of genomic DNA contamination. This kit is designed for two-step RT-PCR and should be used with one of Takara Bio"s qPCR premixes such as TB Green Premix Ex Taq II (Tli RNase H Plus) (Cat. # RR820A), TB Green Premix Ex Taq (Tli RNase H Plus) (Cat. # RR420A), or Premix Ex Taq (Probe qPCR) (Cat. # RR390A).
Over 3,700 peer-reviewed articles have been published in which PrimeScript reverse transcriptase is applied towards the study of gene expression, gene discovery, transcriptome analysis, and miRNA expression regulation.
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DAS-ELISA试剂盒中抗体有包被抗体和酶标抗体，这两种抗体是一种抗体，前者没有酶标，后者用酶进行了标记。
NCM-ELISA一般有一抗和二抗，这两种抗体不一样，前者（一抗）一般是鼠抗体或兔抗体，没有酶标，相对应的二抗一般是羊抗鼠或羊抗兔抗体，用酶进行标记。也有用马大规模备抗体的。
TDS-ELISA是三抗体ELISA，第三级的抗体是将信号级联放大。
以上三种是比较常见的，还有其他一些试剂盒，可参考免疫学的内容。
复习了很多文献在测定方法里面均提到了CV
例如：
Theintra-assaycoefficientofvariationfortheassaywas4-6%.
Theanalyticcoefficientofvariationwas10.2%
问题是：
我是否可以直接使用说明书里的CV值？
如果不可以，我该如何操作进行计算
1．取出试剂盒室温平衡30min，取出血样放至室温。
2．配标准品：取150uL标准品加入150uL标准品稀释液稀释，依次稀释5次。
3．加样：分别于各反应孔中加入标准品50uL，样品40UL，标准品做复孔，样品做3孔。
4．分别于样品孔中加入10UL抗体。
5．标准品和样品孔中分别加入50uL链酶亲和素-HRP，盖上封板膜,轻轻震荡混匀，37℃温育60min。
6．配洗涤液：将30倍浓缩洗涤液用蒸馏水30倍稀释后备用。
7．洗涤：小心揭开封板膜，弃去液体，甩干，每孔加200uL洗涤液，静置30s后弃去，如此重复5次，拍干。
8．显色：每孔先加入显色剂A 50uL，再加显色剂B 50uL，轻轻震荡混匀，37℃避光显色6min。
9． 终止：每孔加入终止液50uL，终止反应（此时蓝色立即转为黄色）。
10．测定：以空白孔调零，450nm波长依序测量各孔的吸光度。测定应在加终止液10min之内进行。
11．保存结果，收拾桌面。
12．分析处理数据
注意事项
1. 取出板条前恢复到室温后再打开外包装袋，实验中不用的板条立即放回包装中，密闭封口，其余不用试剂应盖好。
2. 实验操作中请使用一次性的吸头，避免交叉污染。
3．实验板孔加入试剂的顺序应一致，以保证所有反应孔的孵育时间一致。
4．洗涤过程中反应孔中残留的洗涤液应在滤纸上充分拍干，勿将滤纸直接放入反应孔中吸水。
5．试剂盒内试剂请在保质期内使用，不同批号试剂不要混用。
6．1000pg/ml以上的结果为非线性的，根据此标准曲线无法得到精确的结果。大于1000pg/ml 的样品应以标准稀释缓冲液稀释后重做。在结果分析时，结合考虑相应的稀释度。
现在国内最差也是用3代试剂，有些地方会用4代试剂。
4代试剂（检查抗原+抗体）——窗口期为4周。因为抗原于3-4周达到复制的峰值，此时通过4代试剂检查，如果感染了HIV，抗原/抗体至少有一个为阳性，如果都是阴就排除了。
3代试剂（只查抗体）——窗口期为6周。
以上为理论分析+临床经验的结果，可以说是99.9%的准确度。
但是目前FDA、CDC和试剂生产商统一达成的共识，也就是针对普通人，最保守的窗口期是3个月。无论什么试剂，3个月都100%排除。
