BLAST Search

Database
Query sequence file Push this button to choose your nucleotide sequence file.
or If you enter your sequence below, it will be used for searching.
When you chose your sequence file above, do not enter anything below.
Query sequence
Query strand
Parameters Expectation value (E)
Number of one-line descriptions (V)
Number of alignments to show (B)
Parameters:
E(-e)
A statistical significance threshold for reporting database sequence matches. E is interpreted as the upper bound on the expected frequency of chance occurrence of an HSP (or set of HSPs) within the context of the entire database search.
V(-v)
The maximum number of database sequences for which one-line descriptions will be reported. (The default value for V is 500.)
B(-b)
The maximum number of display of the high-scoring segment pairs (alignments). (The default value for B is 250.)

Default parameters are used for the others.