与一代、二代测序相比,单分子测序技术的优势是什么?并简述原因?

2025-04-06 13:56:03
推荐回答(1个)
回答1:

与一代、二代测序相比,单分子测序技术的优势:由于单分子测序具有通量更高,仪器和试剂相对便宜、操作简单等的优势而比第二代测序技术有更广阔的应用空间。

第一代指双脱氧末端终止法,扩增后通过毛细管电泳读取序列,每次获取数据量少。第二代为高通量测序,采用微珠或高密度芯片边合成边测序,代表有454,solexa,solid,高通量,可一次获得数G数据,相对与第三代,都仍然需要扩增的方法放大信号,扩增后再检测。

利用DNA聚合酶合成

与模板互补的DNA链, 在三维空间中记录模板位置和核苷酸序列信息, 再反向构建DNA模板的序列。除了DNA合成反应的三大要素(模板、酶、核苷酸)之外, 模板所处位置和反应循环中单色荧光标记的核苷酸顺序(如A、C、G、T )也是最终DNA序列能够完成的关键要素。如果反应所用的核苷酸标记着四种不同的荧光, 则每一次反应循环就需要切换不同波长的光以记录不同的碱基。

以上内容参考:百度百科-单分子测序

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