Due to maintenance work, this service may be impaired on Sunday February 1st between 12.00 pm and 06.00 pm CEST.

SIB BLAST Network Service

This NCBI BLAST2 service is maintained by the Swiss Institute of Bioinformatics.

Click on the ? icons to access the online BLAST help.

? Accession number or sequence

Enter a Swiss-Prot/TrEMBL accession number or a PROTEIN sequence in RAW format.

Output format:


Choose the appropriate BLAST ? program and ? database:

blastp - query against the UniProt Knowledgebase (Swiss-Prot + TrEMBL)

? Taxonomic groups (not available for PDB and translated EST):

select a database subsection To restrict the search to a particular taxon, it is much faster to select a database subsection from the drop-down list on the left than to specify your own taxonomic group in the box below. This also gives more accurate statistics.
or specify a taxonomic group Enter a species name, a TaxID or the latin name of a taxonomic group (elements of the OC, OS and OX lines) to restrict your search to a particular taxon. You may enter a list separated by semicolons (";"). Example: Fungi; Homo sapiens.
or select a microbial proteome
Non-redundant Swiss-Prot+TrEMBL complete proteome sets, see the HAMAP pages.
Search only UniProtKB/Swiss-Prot (curated sequences)
blastp - query against another protein database Please, supply an email address if you select the translated ESTs.
tblastn - query against the six-frame translation of a nucleotide database
or select a microbial genome EMBL genome records, including plasmids.
? Your email address:
If an e-mail address is provided, results will be automatically mailed back (recommended for tblastn searches).



? Comparison Matrix:
Number of best scoring sequences to show:
Number of best alignments to show:
? Setting the E threshold: (Number of expected matches in a random database)
? Filter the sequence for low-complexity regions
? Gapped alignment

For a more 'advanced' BLAST2 search (with more options and programs, and a larger variety of databases) please use the original submission form at EMBnet-CH (Lausanne).