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Order of BLAST matches

Kevin Karplus karplus at cheep.cse.ucsc.edu
Mon Nov 1 14:29:23 EST 2004


In article <d2f49f4e.0410192324.122559a8 at posting.google.com>, 
	Jonas Andersson wrote:
> Sometimes when I do a nucleotide BLAST on Genbank, I find that the top
> four-five hits have identical E-values and score. How are these hits
> ordered in such cases? Is there any reason why I should prefer the
> top-most one?

The order is arbitrary (probably the order in the underlying
database), and you should not favor the first one.


------------------------------------------------------------
Kevin Karplus 	karplus at soe.ucsc.edu	http://www.soe.ucsc.edu/~karplus
Professor of Biomolecular Engineering, University of California, Santa Cruz
Undergraduate and Graduate Director, Bioinformatics
Senior member, IEEE	Board of Directors, ISCB (starting Jan 2005)
life member (LAB, Adventure Cycling, American Youth Hostels)
Effective Cycling Instructor #218-ck (lapsed)
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