BLAST: Basic Local Alignment Search Tool
The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches. BLAST can be used to infer functional and evolutionary relationships between sequences as well as help identify members of gene families.
Nucleotide BLAST: Search nucleotide databases using a nucleotide …
Select the sequence database to run searches against. No BLAST database contains all the sequences at NCBI. BLAST databases are organized by informational content (nr, RefSeq, etc.) or by sequencing technique (WGS, EST, etc.). more...
Microbial Nucleotide BLAST
QuickBLASTP is an accelerated version of BLASTP that is very fast and works best if the target percent identity is 50% or more. BlastP simply compares a protein query to a protein database.
Needleman-Wunsch alignment of two nucleotide sequences - BLAST
Select the sequence database to run searches against. No BLAST database contains all the sequences at NCBI. BLAST databases are organized by informational content (nr, RefSeq, etc.) or by sequencing technique (WGS, EST, etc.). more...
BLAST+ executables — BLASTHelp documentation
Do you have difficulties running high volume BLAST searches? Do you have proprietary sequence data to search and cannot use the NCBI BLAST web site? Do you have access to your own server? Do you have your own research pipeline? Have security or IP concerns about sending searches outside of your organization?
BLAST: Basic Local Alignment Search Tool
This page provides links to your unexpired BLAST jobs. Enter a BLAST RID in the RID box below and click Go to find any job by its RID.; Click on an RID to view the corresponding BLAST report.
Welcome to BLAST Help — BLASTHelp documentation
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Frequently Asked Questions — BLASTHelp documentation
Standalone BLAST programs installed on a local computer or on a cloud service. The BLAST programs are command line programs that run BLAST searches against local, downloaded copies of the NCBI BLAST databases, or against custom databases formatted for BLAST.
Overview — BLASTHelp documentation
The NCBI BLAST servers are a shared resource. We give priority to interactive users. In order to ensure availability of the service to the entire community, we may limit searches for some high volume users. Interactive users of the NCBI webpages through a web browser should not encounter problems.
Smart BLAST
Enter query sequence in the text area. It automatically determines the format of the input. To allow this feature, certain conventions are required with regard to the input of identifiers.