blast序列比对中E值是什么意思?

E value——E(Expect)值,表示随机匹配的可能性。E值越大,随机匹配的可能性也越大。E值接近零或为零时,具本上就是完全匹配了 E-value - this tells you the probability of getting this sco...

E value——E(Expect)值,表示随机匹配的可能性。
E值越大,随机匹配的可能性也越大。
E值接近零或为零时,具本上就是完全匹配了

E-value - this tells you the probability of getting this score and homology by chance (from random sequence), that is, the lower (the higher the number behind e-), the more reliable the result is. As I have mentioned above, it's not only about homology, but also about the length, because you can easily find any piece of 10 nucleotides in 3mld human genome with 100% homology, but if you have 350 nucleotides and get 70% homology, than it's still quite good

  • 发表于 2018-05-17 10:45
  • 阅读 ( 17615 )
  • 分类:软件工具

你可能感兴趣的文章

相关问题

0 条评论

请先 登录 后评论
landy
landy

37 篇文章

作家榜 »

  1. omicsgene 702 文章
  2. 安生水 351 文章
  3. Daitoue 167 文章
  4. 生物女学霸 120 文章
  5. xun 82 文章
  6. rzx 78 文章
  7. 红橙子 78 文章
  8. CORNERSTONE 72 文章