https://gcat.davidson.edu/GcatWiki/index.php?action=history&feed=atom&title=E-valueE-value - Revision history2026-04-22T22:10:22ZRevision history for this page on the wikiMediaWiki 1.28.2https://gcat.davidson.edu/GcatWiki/index.php?title=E-value&diff=6183&oldid=prevSalt at 03:18, 9 September 20082008-09-09T03:18:55Z<p></p>
<p><b>New page</b></p><div>This parameter, which stands for "expect value", describes the number of hits one can "expect" to see by chance when searching a database of a particular size. It decreases exponentially with score. Essentially, the e-value describes the random background noise that exists for matches between sequences. For example, an e-value of 1 assigned to a hit can be interpreted as meaning that in a database of the current size, one might expect to see one match with a similar score simply by chance. The lower the e-value, the higher the "significance" of the match. However, searches with short sequences can be virtually identical and also have a relatively high e-value.<br><br />
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[[http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=handbook.glossary.1237#app42]]</div>Salt