Twist 人甲基化组组合通过 123 Mb 的基因组区域靶向 398 万个 CpG 位点,从而聚焦生物相关的甲基化标志物。这一组合拥有广泛的内容,成为研究者从癌症转移、人体发育和功能基因组学等各种各样的应用中探索甲基化部分的不二之选。
该组合经过优化和验证,可与 Twist 新一代测序 (NGS) 甲基化检测系统配合使用,实现完整的端到端工作流程,性能行业领先。高效率捕获提高了表观基因组足迹的检测灵敏度,同时降低了测序成本。因此,该组合是筛选队列样本和发现甲基化区域差异的理想选择。
Twist 人甲基化组组合通过 123 Mb 的基因组区域靶向 398 万个 CpG 位点,从而聚焦生物相关的甲基化标志物。这一组合拥有广泛的内容,成为研究者从癌症转移、人体发育和功能基因组学等各种各样的应用中探索甲基化部分的不二之选。
该组合经过优化和验证,可与 Twist 新一代测序 (NGS) 甲基化检测系统配合使用,实现完整的端到端工作流程,性能行业领先。高效率捕获提高了表观基因组足迹的检测灵敏度,同时降低了测序成本。因此,该组合是筛选队列样本和发现甲基化区域差异的理想选择。
设计和工作流程效率
A complete solution that produces highly complex and uniform sequencing reads for methylation analysis. The end-to-end protocol achieves this by combining an innovative, enzymatic conversion process, optimized target enrichment workflow, and highly developed panel design process.
与普通微阵列相比,覆盖度更广泛
The Twist Human Methylome contains 3.98M CpG sites through the 123 Mb of genomic content target biologically relevant methylation markers. The panel is highly targeted to capture and detect the most current, annotated, and relevant CpG methylation regions in the genome. 84% (17,915,988) of the CpG islands in the genome are identified through enrichment with this panel. An additional 105,288,339 bases of subsequent shores, shelves, and open sea CpG’s and base pairs are covered. Coverage overlap determined by internal experimental data of coverage, including shadow coverage compared to array coverage data files.
与普通微阵列相比的优势
微阵列设计具有静态内容,可能会阻碍发现感兴趣的新表观遗传靶标。目前市场上的阵列也限制了表观基因组中的甲基化组覆盖度,很大比例的甲基化 CpG 位点未得到测量。Twist 人甲基化组靶向富集方法通过杂交捕获组合解决了上述限制问题,该组合能够在 NGS 平台提供的整个测序片段中扩展内容,提高单碱基分辨率。
微阵列在甲基化检测的极端处存在固有的局限性,这归因于低端处的背景噪声高、高端处的信号饱和。由于 NGS 动态范围更大,Twist 人甲基化组检测组合对甲基化区域 (DMR) 差异识别更准确,尤其是在甲基化部分的低端处和高端处。
性能
Twist 人甲基化组检测组合经过设计和湿实验室优化,可提供准确、灵敏且高性能的杂交捕获效率。The panel achieves a depth of coverage of 90% of bases at 30x coverage with high probe specificities of 95% on-target rates. The panel also achieves a fold 80 of 1.54 providing high uniformity across the target region by decreasing the delta between the peaks and valleys of the base call pile ups. Library complexity was inversely represented by a <4% duplication rate at a high sequencing depth of 150x raw coverage. 整体组合捕获效率指标显示,整个甲基化部分检测的水平置信度高,测序成本最低。
