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direct RNA sequencing, as it sequences RNA templates directly without the need to convert them into cDNAs Real-time sequencing Features To assess the accuracy of this method, a four-colour sequencing experiment was conducted using a known 150 bp linear template. Base calls from the real-time reads were determined from their corresponding fluorescence pulses. when the reads were compared to a known sequence, 27 errors consisting of deletions, insertions and mismatches were identified, corresponding to a read accuracy of approximately 83% (131/158). Features Given that most errors appear as stochastic events, the authors showed that repeated sequencing of the same template molecule 15 times or more could improve the consensus read accuracy to 99%. At the 2009 AGBT meeting, Pacific Biosciences reported improvements to their platform; when it was used to sequence the E. coli genome at 38-fold base coverage, 99.3% genome coverage was obtained. The onsensus accuracy reached was 99.999% for the entire genome, with read lengths averaging 964 bases Genome enrichment use NGS platforms to target specific regions of interest This strategy can be used to examine all of the exons in the genome, specific gene families that constitute known drug targets or megabasesize regions that are implicated in disease or pharmacogenetics effects through genome-wide association studies Summary Q 1 请你写出三种基于扩增的新一代测序技术的名称,并列出其中的关键不同技术(以表格的形式给出),并以一种测序技术为例子进行更为详细的阐述。 请列举一种单分子测序的代表技术 不同测序技术具有不同的特点,请你试图设计一个集成系统可以有效地分析出每一种测序技术的缺点。 Q2 如果你掌握了测序技术,你能用它来做什么?(请举出至少五种情况) 当你得到某一细胞状态的大量DNA reads,你会如何利用这些reads(具体想法应该设计相应的流程图)。 当你得到某一细胞状态的大量RNA reads,你会如何利用这些reads (具体想法应该设计相应的流程图) 。 IN SOME RESPECTS, THE POTENTIAL OF NGS IS AKIN TO THE EARLY DAYS OF PCR, WITH ONE’S IMAGINATION BEINGTHE PRIMARY LIMITATION TO ITS USE. P3 重新构建新的DNA序列,基于以下原则: 随机构造20个长度分别为5,10,15,20,25,30,35,45,50,75,100,125,150,175,200,300,500,1000,2000,5000,的序列片段,并将上述20个基因进行适当的突变(每个碱基突变率为1%),重新构造出新的20个序列高度相似的片段, 针对不同的基因重复上述过程1~100次(随机)。 上述所有片段进
有哪些信誉好的足球投注网站
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