Tag Archive | "Discontiguous MegaBlast"

BlastN/MegaBlast/Discontiguous MegaBlast 的区别

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BlastN/MegaBlast/Discontiguous MegaBlast 的区别

Posted on 25 九月 2009 by 柳城 ,阅读 1,160

三者之间的共同之处就是 BlastN/Megablast/Discontiguous megablast 都是BlastN,就是核酸序列比对核酸序列的算法。

简单而言

BlastN : 应该是出现较早的算法。比对的速度慢,但允许更短序列的比对(如短到7个碱基的序列)。

MEGABLAST : 主要用来鉴定一段新的核酸序列,它并不注重比对各个碱基的不同和序列片断的同源性,而只注重被比对序列是否是数据库未收录的,是否为新的提交序列或基因。 速度快。同一物种间的。

Discontiguous MEGABLAST : 灵敏度(sensitivity)更高,用于更精确的比对。主要用于跨物种之间的同源比对。 Continue Reading

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