NCBI Blast

Important update

The core nucleotide database (core_nt) is now the default nucleotide BLAST database. Learn more about core_nt.

Format Request

Query

Protein Sequence

Database

nr

Job title

Protein Sequence

Entrez Query

Note: Your search is limited to records matching this Entrez query

Request ID

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Format

Show	as Reset form to defaults Help These options control formatting of alignments in results pages. The default is HTML, but other formats (including plain text) are available. PSSM and PssmWithParameters are representations of Position Specific Scoring Matrices and are only available for PSI-BLAST. The Advanced view option allows the database descriptions to be sorted by various indices in a table.
Alignment View	Help Choose how to view alignments. The default "pairwise" view shows how each subject sequence aligns individually to the query sequence. The "query-anchored" view shows how all subject sequences align to the query sequence. For each view type, you can choose to show "identities" (matching residues) as letters or dots. more...
Display	Graphical Overview Linkout Sequence Retrieval NCBI-gi CDS feature Help Graphical Overview: Graphical Overview: Show graph of similar sequence regions aligned to query. more... NCBI-gi: Show NCBI gi identifiers. CDS feature: Show annotated coding region and translation. more...
Masking	Character: Color: Help Masking Character: Display masked (filtered) sequence regions as lower-case or as specific letters (N for nucleotide, P for protein). Masking Color: Display masked sequence regions in the given color.
Limit results	Descriptions: Graphical overview: Alignments: Line length: Help Descriptions: Show short descriptions for up to the given number of sequences. Alignments: Show alignments for up to the given number of sequences, in order of statistical significance. Line lenghth: Number of letters to show on one line in an alignment.
	Organism Type common name, binomial, taxid, or group name. Only 20 top taxa will be shown. exclude Help Show only sequences from the given organism.
	Entrez query: Help Show only those sequences that match the given Entrez query. more...
	Expect Min: Expect Max: Help Show only sequences with expect values in the given range. more...
	Percent Identity Min: Percent Identity Max: Help Show only sequences with percent identity values in the given range.
Format for	PSI-BLAST with inclusion threshold: Help Format for PSI-BLAST: The Position-Specific Iterated BLAST (PSI-BLAST) program performs iterative searches with a protein query, in which sequences found in one round of search are used to build a custom score model for the next round. more... Inclusion Threshold: This sets the statistical significance threshold for including a sequence in the model used by PSI-BLAST to create the PSSM on the next iteration.