mirror of https://github.com/CrimsonTome/tldr.git
29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
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# blastn
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> Nucleotide-Nucleotide BLAST.
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> More information: <https://www.ncbi.nlm.nih.gov/books/NBK279684/table/appendices.T.blastn_application_options/>.
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- Align two or more sequences using megablast (default), with the e-value threshold of 1e-9, pairwise output format (default):
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`blastn -query {{query.fa}} -subject {{subject.fa}} -evalue {{1e-9}}`
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- Align two or more sequences using blastn:
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`blastn -task blastn -query {{query.fa}} -subject {{subject.fa}}`
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- Align two or more sequences, custom tabular output format, output to file:
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`blastn -query {{query.fa}} -subject {{subject.fa}} -outfmt {{'6 qseqid qlen qstart qend sseqid slen sstart send bitscore evalue pident'}} -out {{output.tsv}}`
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- Search nucleotide databases using a nucleotide query, 16 threads (CPUs) to use in the BLAST search, with a maximum number of 10 aligned sequences to keep:
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`blastn -query {{query.fa}} -db {{path/to/blast_db}} -num_threads {{16}} -max_target_seqs {{10}}`
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- Search the remote non-redundant nucleotide database using a nucleotide query:
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`blastn -query {{query.fa}} -db {{nt}} -remote`
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- Display help (use `-help` for detailed help):
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`blastn -h`
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