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What does the "N" column mean of the TBLASTX output?
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3.2 years ago
2351688559 • 10
China

Dear all,

When I use TBLASTX, I found the result gives an additional column "N", which never appears if using other programs. I really don't know what it means....I even wounder, if this really meaningful? Would any one tell me what it is? Thank you!!

blast tblastx • 986 views
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Is it possible for you to provide a sample output with this column "N" ?

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! it is like this:

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Can you provide your blast cmd? Or did you run on the web?

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19 months ago
France/Nantes/Institut du Thorax - INSE…
 eShowSumN = (1 << 4), //Sum_n in blast score structure


so what is this sum_n ? I wonder if it's not the number of hsp (?)

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2.4 years ago
astokar • 10

The number in the "N" column indicates how many HSPs were used in computing the statistics for the sequence. If the number is greater than 1, the scores of multiple HSPs were combined to produce the result.