Jul 21, 2025 · The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence …

Program Selection Optimize for Optimize for Highly similar sequences (megablast) Optimize for More dissimilar sequences (discontiguous megablast) Optimize for Somewhat similar …

Mar 17, 2025 · Overview ¶ What is BLAST? The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or …

PSI-BLAST allows the user to build a PSSM (position-specific scoring matrix) using the results of the first BlastP run. PHI-BLAST performs the search but limits alignments to those that match …

Welcome to BLAST Help ¶ Getting started ¶ Web BLAST quick start guide New BLAST databases New Guide to BLAST home and search pages Blast report description Blast topics …

BLAST+ executables What are the next steps? Magic-BLAST IgBLAST SRPRISM Databases BLAST+ executables ¶ Do you have difficulties running high volume BLAST searches? Do you …

BLAST Assembled Genomes contains links to genomic BLAST pages for common organisms, and a link to a complete list of available organism genome BLAST pages Basic BLAST …

Title: Core nucleotide BLAST database Description: The core nucleotide BLAST database consists of GenBank+EMBL+DDBJ+PDB+RefSeq sequences, but excludes EST, STS, GSS, …

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 …

2. BLAST Database Content A BLAST search has four components: query, database, program, and search purpose/goal. To discuss effective BLAST program selection, we first need to …