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blastn
blastp
blastx
tblastn
BLASTN programs search nucleotide databases using a nucleotide query.
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Nucleotide query sequence
Enter accession number(s), gi(s), or FASTA sequence(s)
Clear
Query subrange
From
To
Or, upload file
Job Title
Enter a descriptive title for your BLAST search
Search set
Database Category
Standard databases (nr etc.)
rRNA/ITS databases
Genomic + transcript databases
Betacoronavirus
Experimental databases
Database
Core nucleotide database (core_nt)
RefSeq Select RNA sequences (refseq_select)
Reference RNA sequences (refseq_rna)
Nucleotide collection (nr/nt)
Transcriptome Shotgun Assembly (TSA)
Patent sequences (pat)
PDB nucleotide database (pdb)
Organism
Include
Exclude
Exclude
Models (XM/XP)
Uncultured/environmental sample sequences
Program selection
Optimize for
Highly similar sequences (megablast)
More dissimilar sequences (discontiguous megablast)
Somewhat similar sequences (blastn)
BLAST
Searching
database core_nt
using
Megablast (Optimize for highly similar sequences)
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Algorithm Parameters